What is the minimum surface area of a box whose base is a square and with no top that holds 32 cm³. a 16 b 32 c 64 d 48

Answers

Answer 1

The minimum surface area of the box is 68 cm², which corresponds to option (d).

How to calculate the surface area of box?

Let the side length of the square base be x and the height of the box be h. Then, we have:

Volume of the box = x²h = 32

h = 32/x²

The surface area of the box is given by:

S = x² + 4(xh) = x² + 4x(32/x²) = x² + 128/x

To find the minimum surface area, we can differentiate S with respect to x, set the derivative equal to zero, and solve for x:

dS/dx = 2x - 128/x² = 0

2x = 128/x²

x⁴ = 64

x = 2 cm

Note that we need to check that this critical point gives us a minimum surface area. We can do this by checking the second derivative:

d²S/dx² = 2 + 256/x³

d²S/dx² at x = 2 is positive,

indicating that this critical point gives us a minimum surface area.

Substituting x = 2 in the equation for S, we get:

S = 2² + 128/2 = 4 + 64 = 68

Therefore, the minimum surface area of the box is 68 cm², which corresponds to option (d).

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Related Questions

write an equation of the line that passes through each pair of points (5, 7), (-8, -4)

Answers

Answer:

y = 11x/13 + 36/13

Step-by-step explanation:

We can write the line using y = mx + b form.

To find the slope, m, we can use the formula (y1 - y2) / (x1 - x2):

(7-(-4)) / (5-(-8)) = (7+4) / (5+8) = 11 / 13.

To find b, we can plug in one of the points. Lets use (5, 7).

y = 11/13 * x + b

7 = 11/13 * 5 + b

7 - 55/13 = b

b = 91/13 - 55/13 = (91-55)/13 = 36/13.

Your equation is:

y = 11x/13 + 36/13.

Answer: y = [tex]\frac{11}{13}[/tex]x + [tex]\frac{36}{13}[/tex]

Step-by-step explanation:

First, we will find the slope.

       [tex]m=\displaystyle \frac{y_{2} -y_{1} }{x_{2} -x_{1} }=\frac{-4-7}{-8-5} =\frac{-11}{-13} =\frac{11}{13}[/tex]

Next, we will substitute this slope and a given point in and solve for our y-intercept (b).

       y = [tex]\frac{11}{13}[/tex]x + b

       (7) = [tex]\frac{11}{13}[/tex](5) + b

       (7) = [tex]\frac{11}{13}[/tex](5) + b

       7 = [tex]\frac{55}{13}[/tex] + b

       b = 7 - [tex]\frac{55}{13}[/tex]

       b = [tex]\frac{36}{13}[/tex]

Final equation:

       y = mx + b

     y = [tex]\frac{11}{13}[/tex]x + [tex]\frac{36}{13}[/tex]

Warren wants to buy grass seed to cover his whole lawn, except for the pool. the pool is 5 3/4m by 3 1/2m. find the area the grass seed needs to cover
find the area the grass seed needs to cover

Answers

Grass Seed Area = L - 20 1/8

To help Warren determine the area of his lawn where grass seed is needed, we first need to know the total area of his lawn.

Unfortunately, you have not provided the dimensions of the entire lawn. However, I can guide you through the process using the information given about the pool.

First, let's find the area of the pool. The dimensions are 5 3/4m by 3 1/2m. To find the area, multiply the length by the width:
Area = (5 3/4) * (3 1/2)
Convert the mixed numbers to improper fractions:
Area = (23/4) * (7/2)
Multiply the fractions:
Area = (23*7) / (4*2) = 161/8

Now convert the improper fraction back to a mixed number:
Area = 20 1/8 square meters
This is the area of the pool. To find the area where grass seed is needed, subtract the pool's area from the total area of the lawn. Assuming the total area of the lawn is "L" square meters, the area to be covered with grass seed would be:
Grass Seed Area = L - 20 1/8

Once you provide the dimensions of the entire lawn, you can follow these steps to find the area where grass seed is needed.

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Tim made his mother a quilt. The width is 6 5 /7 ft and the length is 7 3 /5 ft. What is the area of the quilt?

Answers

The quilt's area is approximately 60.74 square feet.

How to calculate the quilt's area?

To calculate the area of the quilt, we need to multiply the width by the length.

First, we need to convert the mixed numbers to improper fractions:

Width: 6 5/7 ft = (7 x 6 + 5)/7 = 47/7 ft

Length: 7 3/5 ft = (5 x 7 + 3)/5 = 38/5 ft

Now, we can multiply the width by the length:

Area = width x length

Area = (47/7) ft x (38/5) ft

Area = 2126/35 sq ft

Area ≈ 60.74 sq ft

Therefore, the area of the quilt is approximately 60.74 square feet.

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Team One has one-quarter the number of people as Team Two and 12 other people are transferred from Team Two to Team One, the number of people on each team team is equal. How many people were initially on Team One?

Answers

There were initially 8 people on Team One.

Let's assume the number of people on Team Two to be "x". According to the given condition, the number of people on Team One is one-quarter of Team Two. Therefore, the number of people on Team One is x/4.

Now, 12 people are transferred from Team Two to Team One. So, the new number of people on Team Two is x-12, and the new number of people on Team One is x/4+12.

As per the given condition, the new number of people on each team is equal. So, we can write the following equation:

x/4+12 = x-12

Solving this equation, we get:

3x/4 = 24

x = 32

So, the initial number of people on Team One is x/4, which is:

32/4 = 8

Therefore, there were initially 8 people on Team One.

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Kristen is trying to determine the x-intercepts of the graph of a quadratic function. Which form would be the most beneficial in order for Kristen to quickly identify the coordinates? A. Standard Form B. Intercept Form C. Vertex Form

Answers

The form in which is easier to identify the x-intercepts is the one in option B. Intercept form.

Which form would be the most beneficial in order for Kristen to quickly identify the coordinates?

If a quadratic equation has a leading coefficient a and x-intercepts x₁ and x₂, then the quadratic equation can be written as:

y = a*(x - x₁)*(x - x₂)

That is called the factored form or the intercept form.

Notice that if the quadratic equation is written in that form, is really easy to identify the x-intercepts of the equation, then that would be the most beneficial form in order for Kristen to quickly identify the coordinates, the correct option is B.

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Please help
given vectors u and v, find (a)6u (b)6u+4v (c) v-4u
u=(4,5) v=(4,0)
(a) 6u
(b) 6u+4v
(c) v-4u​

Answers

For the given vectors u and v, (a) 6u =  (24, 30). (b) 6u+4v =  (40, 30).      (c) v-4u =  (-12, -20).

Given vectors u and v.

a) To find 6u, we simply multiply each component of u by 6:

6u = 6(4, 5) = (6(4), 6(5)) = (24, 30)

Therefore, 6u = (24, 30).

b) To find 6u + 4v, we first need to find 4v by multiplying each component of v by 4:

4v = 4(4, 0) = (4(4), 4(0)) = (16, 0)

Next, we add 6u and 4v by adding the corresponding components:

6u + 4v = (24, 30) + (16, 0) = (24+16, 30+0) = (40, 30)

Therefore, 6u + 4v = (40, 30).

c) To find v - 4u, we first need to find 4u by multiplying each component of u by 4:

4u = 4(4, 5) = (4(4), 4(5)) = (16, 20)

Next, we subtract 4u from v by subtracting the corresponding components:

v - 4u = (4, 0) - (16, 20) = (4-16, 0-20) = (-12, -20)

Therefore, v - 4u = (-12, -20).

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The volume of a paper cone of radius 2. 4cm is 95. 4 cm3. The paper is cut along the slant height from O to AB. The cone is opened to form a sector OAB of a circle with centre O. Calculate the sector angle x°. [The volume, V, of a cone with radius r and height h is V= 1/3 x pi x r^2 x h. ]

Answers

The sector angle formed by the cone when it is opened is 54°.

V = 95.4 cm³

r = 2.4 cm

Calculating the height of the cone using the volume formula,

V= 1/3 x π x r² x h

Substituting the values -

95.4 = 1/3 x 3.14 x 2.4² x h

95.4 = 6.03 x h

h = 15.8 cm

Calculating the slant height using  the Pythagoras theorem -

l = √(h² + r²)

Substituting the values -

l = √(15.8² + 2.4²)

l = 16

Calculating the curved surface area of the cone -

= πrl

= π(2.4)(16)

= 120.6 cm².

Calculating the sector angle of the sector formed -

The curved surface area of the cone = area of the sector formed by the cone

= 120.6 cm².

Area of a sector in a circle = ∅/360 × πr²,

120.6 = ∅/360 × (3.14)(16²)

120.6 = ∅/360 × 803.84

(120.6)(360) = (∅)(803.84)

43,416/803.84 = ∅

∅ = 54°

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πα d Find dx f-'(4) where f(x) = 4 + 2x3 + sin (*) for –1 5151. = 2

Answers

After plugging the derivatives of f(x) we get, dx f-'(4) = f'(√(2/3)) = 4 + cos(Ф)

To find dx f-'(4), we need to take the derivative of f(x) and then solve for x when f'(x) equals 4.

First, let's find the derivative of f(x):

f'(x) = 6x² + cos(Ф)

Next, we need to solve for x when f'(x) equals 4:

6x² + cos(Ф) = 4

cos(Ф) = 4 - 6x²

Now, we can use the given value of πα d to solve for x:

πα d = -1/2

α = -1/2πd

α = -1/2π(-1)

α = 1/2π

d = -1/2πα

d = -1/2π(1/2π)

d = -1/4

So, we have:

cos(Ф) = 4 - 6x²

cos(πα d) = 4 - 6x²   (substituting in the given value of πα d)

cos(-π/2) = 4 - 6x²    (evaluating cos(πα d))

0 = 4 - 6x²

6x² = 4

x² = 2/3

x = ±√(2/3)

Since we're looking for the derivative at x = 4, we can only use the positive root:

x = √(2/3)

Now, we can plug this value of x back into the derivative of f(x) to find dx f-'(4):

f'(√(2/3)) = 6(√(2/3))² + cos(Ф)

f'(√(2/3)) = 4 + cos(Ф)

dx f-'(4) = f'(√(2/3)) = 4 + cos(Ф)

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show that tan(15 ) = 2 - rt3

Answers

By using trigonometry,

we have shown that tan(15°) = 2 - √3.

what is the trignometry?

One of the most significant areas of mathematics, trigonometry has a wide range of applications. T

he study of the relationship between the sides and angles of the right-angle triangle is essentially the focus of the field of mathematics known as "trigonometry."

Hence, employing trigonometric formulas, functions, or trigonometric identities can be helpful in determining the missing or unknown angles or sides of a right triangle.

Angles in trigonometry can be expressed as either degrees or radians. 0°, 30°, 45°, 60°, and 90° are some of the trigonometric angles that are most frequently employed in computations.

We can use the half-angle formula for tangent to show that:

tan(15°) = tan(30°/2) = (1 - cos(30°)) / sin(30°)

We know that cos(30°) = √3/2 and sin(30°) = 1/2, so we can substitute those values in:

tan(15°) = (1 - √3/2) / 1/2

Simplifying the denominator and multiplying by the reciprocal:

tan(15°) = 2(1 - √3/2)

Simplifying the expression:

tan(15°) = 2 - √3

Therefore, we have shown that tan(15°) = 2 - √3.

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verify that the equation is an identity. 2cosx2x/sin2x=cotx-tanx

Answers

The LHS is equal to the RHS, and the given equation is verified as an identity. We have to verify that the following equation is an identity:

2cos(x) 2x / sin2(x) = cot(x) - tan(x)

Starting from the left-hand side (LHS):

2cos(x) 2x / sin2(x) = 2cos(x) 2x / (1 - cos2(x)) (using the identity sin2(x) = 1 - cos2(x))

= 2cos(x) 2x / (1 - cos(x)) (1 + cos(x))

= 2cos(x) 2x / (1 - cos(x)) (1 + cos(x)) (multiplying the denominator by (1 + cos(x)))

= 2cos(x) 2x / (1 - cos2(x))

= 2cos(x) 2x / sin2(x) (using the identity 1 - cos2(x) = sin2(x))

= 2cos(x) / sin(x) (simplifying by canceling out the common factor of 2 and cos(x))

= 2cos(x) / sin(x) * (cos(x) / cos(x)) (multiplying by 1 in the form of cos(x)/cos(x))

= 2cos2(x) / (sin(x)cos(x))

= 2cos(x)/sin(x) * cos(x)

= cot(x) * cos(x)

Now, moving to the right-hand side (RHS):

cot(x) - tan(x) = cos(x)/sin(x) - sin(x)/cos(x)

= cos2(x)/sin(x)cos(x) - sin2(x)/sin(x)cos(x)

= (cos2(x) - sin2(x))/sin(x)cos(x)

= cos(x)/sin(x) * cos(x)/cos(x) - sin(x)/cos(x) * sin(x)/sin(x) (using the identity cos2(x) - sin2(x) = cos(x)cos(x) - sin(x)sin(x))

= cot(x) * cos(x)

Therefore, the LHS is equal to the RHS, and the given equation is verified as an identity.

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Please help I need all of this in alphabetical order

Answers

Answer: Apartment

Confidence

Cooperating

Disrespect

Encode

Forearm

Injustice

Intercontinental

Interplanetary

Mold

Overgrown

Refuel

Repaid

Semi-Sweet

Semicircular

Shield

Subzero

Supermarket

Transportation

Unbelievably

Step-by-step explanation:

Answer:

15

13

6

11

7

1

4

12

17

16

10

8

9

19

3

18

2

5

14

20

Use three strategies to find 3r in terms of x and y, where dx Strategy 1: Use implicit differentiation directly on the given equation Strategy 2: Multiply both sides of the given equation by the denominator of the left side, then use implicit differentiation. Strategy 3: Solve for y, then differentiate. Do your three answers look the same? If not, how can you show that they are all correct answers?

Answers

We can follow the following strategies separated by comma's : Use implicit differentiation directly on the given equation, Multiply both sides of the given equation by the denominator of the left side, then use implicit differentiation
, Solve for y, then differentiate.

Strategy 1: Use implicit differentiation directly on the given equation Start by taking the derivative of both sides of the equation with respect to x:  dy/dx = (3x^2 + 2xy)/(2y - 3) . Now solve for 3r:
3r = (dy/dx)(2y - 3)/(2x)

3r = (3x^2 + 2xy)/(4x)

3r = (3/4)x + (1/2)y

Strategy 2: Multiply both sides of the given equation by the denominator of the left side, then use implicit differentiation
Start by multiplying both sides of the equation by (2y - 3):  (2y - 3)y = 3x^2 + 2xy . Simplify:
2y^2 - 3y = 3x^2 + 2xy

Now take the derivative of both sides with respect to x:

d/dx(2y^2 - 3y) = d/dx(3x^2 + 2xy)

4y(dy/dx) - 3(dy/dx) = 6x + 2y(dy/dx)

Solve for dy/dx:

dy/dx = (6x - 3y)/(2y - 4y) = (3x - y)/(y - 2)

Now solve for 3r:

3r = (dy/dx)(2y - 3)/(2x)

3r = ((3x - y)/(y - 2))(2y - 3)/(2x)

3r = (3/4)x + (1/2)y

Strategy 3: Solve for y, then differentiate Start by solving the given equation for y:  2y^2 - 3y = 3x^2 + 2xy
2y^2 - 2xy - 3y - 3x^2 = 0

Use the quadratic formula:

y = (2x ± sqrt(4x^2 + 24x^2))/4

Simplify:

y = (x ± sqrt(7)x)/2

Now take the derivative of y with respect to x:

dy/dx = (1 ± (1/2)sqrt(7))/(2)

Solve for 3r:

3r = (dy/dx)(2y - 3)/(2x)

3r = ((1 ± (1/2)sqrt(7))/(2))(2(x ± sqrt(7)x)/2 - 3)/(2x)

3r = (3/4)x + (1/2)y

All three strategies result in the same answer for 3r in terms of x and y, which is (3/4)x + (1/2)y. This can be shown by simplifying the expressions obtained in each strategy and verifying that they are equivalent. Unfortunately, we cannot proceed with the explanation as the given equation is missing from the student question. Please provide the equation involving x, y, and r to receive a detailed step-by-step explanation of the three strategies.

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A recipe calls for 8 ounces of chocolate chips in each batch. How many pounds of chocolate chips do you need to make six batches? (1 pound 16 oz)
please I need explanation for that work

Answers

If you multiply 8 and 6 you get 48 and 48 divided by 16 is 2.5. You would need 3 pounds of chocolate chips unless you are allowed to use halves. But I think you should go with 3.

2.1.2. What is the sum of handshakes that will be made by the first and second ​

Answers

67 is the sum of handshakes given by the first and second participants.

Let n be the total number of participants in the workshop venue.

i.e, here n= 35

For the first participant, the number of handshakes is = (n-1)

= (35-1)

= 34

The number of handshakes by the second participant is also same as that of the first participant = 34

The number of handshakes given by the first and second participants together = (first participant handshake + second participant handshake - 1)

= (34 + 34 -1)

= 68-1

= 67

Hence 67 is the sum of handshakes given by the first and second participants.

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The complete question is =

A workshop venue has 35 participants . Each participant shakes hands with each each and every other participant . How is the sum of. Handshakes that will bemade bythe first and second participant

5+x =n what must be true about any value of x if n is a negaitive number

Answers

Therefore , the solution of the given problem of equation comes out to be  x must be less than -5 for any value of x that causes 5 + x = n to be a negative number.

What is an equation?

In order to demonstrate consistency between two opposing statements, variable words are frequently used in sophisticated algorithms. Equations are academic phrases that are used to demonstrate the equality of different academic figures. Consider expression the details as y + 7 offers. In this case, elevating produces b + 7 when partnered with building y + 7.

Here,

If n is a negative number and 5 + x = n, then x must be less than -5.

This is due to the fact that n would be greater than or equal to 5, which is not a negative number, if x were greater than or equal to -5, which would lead 5 + x to be greater than or equal to 0.

However,

if x is less than -5, then 5 + x will be less than 0, and n will be a negative number because n will be less than 5.

Therefore, x must be less than -5 for any value of x that causes 5 + x = n to be a negative number.

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Which expression is equivalent to the given expression?
2x^2-11x-6

Answers

Answer:

B

Step-by-step explanation:

using the diamond factoring method:

2x^2-12x+x-6

2x(x-6) + (x-6)

(2x+1)(x-6)

B

Due to an unresolved national issue, the popularity of a politician is suspected to have decreased over the past year. his popularity vote percentage used to be 55%. to confirm the suspicion, a sample of 820 adult residents is surveyed. the survey reveals that 405 of the respondents still support him. determine if there exists a significant decrease in his popularity vote percentage. use significance level of 0.10 to conduct a hypothesis testing ​

Answers

Answer:

Step-by-step explanation:

To test if there exists a significant decrease in the popularity vote percentage of the politician, we can conduct a hypothesis test using the significance level of 0.10.

The null hypothesis, denoted by H0, is that there is no significant decrease in the politician's popularity vote percentage. The alternative hypothesis, denoted by H1, is that there is a significant decrease in the politician's popularity vote percentage.

We can use the sample proportion of supporters, which is 405/820 = 0.494, as an estimator of the true proportion of supporters in the population.

Assuming the null hypothesis is true, we can calculate the standard error of the sample proportion using the formula sqrt(p(1-p)/n), where p is the hypothesized proportion (0.55) and n is the sample size (820). This gives us a standard error of sqrt(0.55*0.45/820) = 0.024.

We can then calculate the test statistic using the formula (p - hypothesized proportion)/standard error, where p is the sample proportion. This gives us a test statistic of (0.494 - 0.55)/0.024 = -2.333.

With a significance level of 0.10 and a two-tailed test, the critical values for the test statistic are -1.645 and 1.645. Since the calculated test statistic (-2.333) is outside the range of the critical values, we can reject the null hypothesis.

Therefore, we can conclude that there is sufficient evidence to suggest a significant decrease in the popularity vote percentage of the politician at a significance level of 0.10.

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Suppose the area of a square can be represented by the expression 25x^2 + 80x + 64. What is an expression for the length of one side of the square?

Answers

The expression for the length of one side of the square is: 5x + 8.

How to find length of one side of the square?

To see why, note that the area of a square is given by side squared, so we can set up an equation:

[tex]side^2 = 25x^2 + 80x + 64[/tex]

Taking the square root of both sides, we get:

[tex]side =[/tex] √ [tex](25x^2 + 80x + 64)[/tex]

Simplifying the square root, we get:

side = √[(5x + 8)(5x + 8)]

And finally, we can take the square root of the perfect square to get:

side = 5x + 8.

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2. A particular ostrich runs 40 miles per hour. Select the animals who run at a faster unit rate per hour than the
ostrich. Mark all that apply.
A. O giraffe: 96 miles in 3 hours
B. O elk: 90 miles in 2 hours
c. O lion: 150 miles in 3 hours
D. O squirrel: 36 miles in 3 hours

Answers

B elk: 90 miles in 2 hours
And
C lion: 150 miles in 3 hours

The marginal cost function for a company is given by C'(q) = q^2 - 17q + 70 dollars/unit;
where q is the quantity produced. If C(0) = 650, find the total cost of producing 20 units. What is the fixed cost and what is the total variable cost for this quantity? Fixed cost = Variable Cost of producing 20 units =
Total cost of producing 20 units =

Answers

The problem involves analyzing the cost of production for a company that produces a certain quantity of units. Specifically, we are given the marginal cost function C'(q) = q^2 - 17q + 70, where q is the quantity produced, and we need to find the total cost of producing 20 units, as well as the fixed cost and variable cost for this quantity. To find the total cost, we need to integrate the marginal cost function from 0 to 20, which will give us the total variable cost. We can then find the fixed cost by subtracting the total variable cost from the initial cost C(0), which is given in the problem. Cost analysis is an important concept in economics and business, and is used to optimize production and pricing decisions for companies. Understanding the relationship between marginal cost, fixed cost, and variable cost is crucial for making informed decisions about production and pricing strategies.

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The marginal cost function for a company is given by C'(q) = [tex]q^2[/tex] - 17q + 70 dollars/unit; where q is the quantity produced. If C(0) = 650, then total cost of producing 20 units = 2,600 dollars. Fixed cost for the quantity = 650 dollars. Variable Cost of producing 20 units = 1,950 dollars

To find the total cost function C(q), integrate the marginal cost function C'(q):

C(q) = ∫[tex](q^2 - 17q + 70)[/tex] dq = [tex](1/3)q^3 - (17/2)q^2 + 70q + K[/tex]

To find the constant K, use the given information: C(0) = 650

650 = [tex](1/3)(0)^3 - (17/2)(0)^2 + 70(0) + K[/tex]
K = 650

So the total cost function is:

C(q) = [tex](1/3)q^3 - (17/2)q^2 + 70q + 650[/tex]

Now, we find the total cost of producing 20 units:

C(20) = [tex](1/3)(20)^3 - (17/2)(20)^2 + 70(20) + 650[/tex]
C(20) = 2,600

Total cost of producing 20 units = 2,600 dollars.

Fixed cost is the cost incurred when producing 0 units, which is given as C(0) = 650 dollars.

To find the total variable cost for producing 20 units, subtract the fixed cost from the total cost:

Variable Cost = Total Cost - Fixed Cost
Variable Cost = 2,600 - 650
Variable Cost = 1,950 dollars

To summarize:
Fixed cost = 650 dollars
Variable cost of producing 20 units = 1,950 dollars
Total cost of producing 20 units = 2,600 dollars

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Can someone help me asap? It’s due today!!

Answers

John would have the option of taking 10 different cones

How to solve for the cone

The questions says that there is the option of having the flavors that are available ice cream flavors are: chocolate (C), mint chocolate chip (M), strawberry (S), rainbow sherbet (R), and vanilla (V).

The available flavors are then 5 in number

Then the number of scoops that he can have from each of the cone is said to be 2

Hence we would have 5 x 2

= 10

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4. The perimeter of an isosceles trapezoid ABCD is 27. 4 inches. If BC = 2 (AB), find AD, AB, BC, and CD. ​

Answers

The lengths of the sides are: AB = CD = 4.5667 inches; BC = 9.1333 inches and AD = 9.1333 inches

An isosceles trapezoid is a four-sided figure with two parallel sides and two non-parallel sides that are equal in length. In this problem, we are given that the perimeter of the isosceles trapezoid ABCD is 27.4 inches, and that BC is twice as long as AB.

Let's start by assigning variables to the lengths of the sides. Let AB = x, BC = 2x, CD = x, and AD = y. Since the perimeter of the trapezoid is the sum of all four sides, we can write the equation:

x + 2x + x + y = 27.4

Simplifying the equation, we get:

4x + y = 27.4

We also know that the non-parallel sides of an isosceles trapezoid are equal in length, so we can write:

AB = CD = x

Now we can use the fact that BC is twice as long as AB to write:

BC = 2AB

Substituting x for AB, we get:

2x = BC

Now we can use the Pythagorean theorem to find the length of AD. The Pythagorean theorem states that in a right triangle, the sum of the squares of the legs (the shorter sides) is equal to the square of the hypotenuse (the longest side). Since AD is the hypotenuse of a right triangle, we can write:

AD^2 = BC^2 - (AB - CD)^2

Substituting the values we know, we get:

y^2 = (2x)^2 - (x - x)^2

Simplifying, we get:

y^2 = 4x^2

Taking the square root of both sides, we get:

y = 2x

Now we can use the equation we found earlier to solve for x:

4x + y = 27.4

4x + 2x = 27.4

6x = 27.4

x = 4.5667

Now we can find the lengths of the other sides:

AB = CD = x = 4.5667

BC = 2AB = 2x = 9.1333

AD = y = 2x = 9.1333

So the lengths of the sides are:

AB = CD = 4.5667 inches

BC = 9.1333 inches

AD = 9.1333 inches

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The perimeter of a square tabletop is 20 feet. What size tablecloth is needed to make sure to cover all of the table?


O A 1672


B. 25 ft2


OC. 80 ft2


OD 400 ft2

Answers

The size  of square tablecloth needed to cover the entire square tabletop is 25 ft^2 (Option B).

To determine the size of the tablecloth needed to cover a square tabletop with a perimeter of 20 feet, we will first find the side length of the square and then calculate the area.

Step 1: Determine the side length of the square.
Since the perimeter of a square is equal to 4 times its side length (P = 4s), we can find the side length by dividing the perimeter by 4.
Side length (s) = Perimeter (P) / 4 = 20 ft / 4 = 5 ft

Step 2: Calculate the area of the square.
The area of a square is equal to the side length squared (A = s^2).
Area (A) = Side length (s) ^ 2 = 5 ft ^ 2 = 25 ft^2

So, the size of the tablecloth needed to cover the entire square tabletop is 25 ft^2 (Option B).

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Find the distance traveled by the top of second hand of a clock in 4 minute if the hand is 8 cm long

Answers

The second hand of a clock rotates once around the clock face in 60 seconds or one minute. Therefore, in 4 minutes, the second hand will rotate 4 times around the clock face.

The length of the second hand of a clock is 8 cm. The distance traveled by the top of the second hand in one full rotation is equal to the circumference of a circle with radius 8 cm, which is 2πr = 2π(8) = 16π cm.

The distance traveled by the top of the second hand in 4 rotations (or 4 minutes) is:

4 rotations * 16π cm/rotation = 64π cm

So the distance traveled by the top of the second hand of a clock in 4 minutes if the hand is 8 cm long is approximately 64π cm or about 201.06 cm (when rounded to two decimal places).

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The angle of elevation of the sun is 35º from the ground. A business building downtown is 50 m tall. How long is the shadow


cast by the building?


Round to one decimal place if necessary and do not include units in your answer.

Answers

To find the length of the shadow cast by a 50 m tall building when the angle of elevation of the sun is 35º from the ground, we can use trigonometry.

Step 1: Identify the known values and the unknown.
- Angle of elevation: 35º
- Building height: 50 m
- Unknown: Shadow length

Step 2: Recognize the trigonometric function to be used.
Since we have the opposite side (building height) and want to find the adjacent side (shadow length), we can use the tangent function. The formula is:

tan(angle) = opposite side/adjacent side

Step 3: Plug in the known values and solve for the unknown.
tan(35º) = 50 m / shadow length

Step 4: Rearrange the equation to isolate the shadow length.
shadow length = 50 m / tan(35º)

Step 5: Calculate the shadow length.
shadow length ≈ 50 m / 0.7002 ≈ 71.4 m

So, the length of the shadow cast by the building is approximately 71.4 m.

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Determine whether the function is an example of exponential growth or exponential decay then find the y-intercept y=8 (2/7)^x

Answers

This function is an example of exponential decay because the base of the exponential term (2/7) is between 0 and 1. and the y-intercept is 8.

To find the y-intercept, we need to evaluate the function when x=0, which gives:

y = 8 (2/7)^0 = 8

The given function is an example of exponential decay. In an exponential function, if the base of the exponent is between 0 and 1, the function shows exponential decay, and if it is greater than 1, the function shows exponential growth.

In the given function y = 8 (2/7)^x, the base of the exponent is 2/7, which is less than 1. This means that as the value of x increases, the value of the function decreases at a decreasing rate, which is the characteristic of exponential decay.

To find the y-intercept of the function, we can substitute x=0 in the given function. When x=0, we have:

y = 8 (2/7)^0

y = 8 x 1

y = 8

This means that the y-intercept of the function is (0, 8), which is the point where the function intersects the y-axis. In this case, it represents the initial value of the function when x=0.

Therefore, This function is an example of exponential decay because the base of the exponential term (2/7) is between 0 and 1. and the y-intercept is 8.

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The volumes of two similar solids are 857.5 mm^3 and 540 mm^3. The surface area of the smaller solid is 108 mm^2. What is the surface area of the larger solid?
*
147 mm^2
68 mm^2
16 mm^2
216 mm^2

Answers

Answer:

147 mm^2

Step-by-step explanation: The surface area has to be more, but not double the smaller figures surface area therefore the answer is 147 mm^2

The requried surface area of the larger solid is approximately 147 mm². Option A is correct.

What is surface area?

The surface area of any shape is the area of the shape that is faced or the Surface area is the amount of area covering the exterior of a 3D shape.

Let's call the larger solid's surface area S.

Since the two solids are similar, their volumes have a ratio of (side length)³. Let's call the ratio of the side lengths of the larger to the smaller solid as k. Then:

[tex](k^3)(540 mm^3) = 857.5 mm^3[/tex]

Simplifying the above equation, we get:

[tex]k = (857.5/540)^{(1/3)}[/tex] =7/6

So, the larger solid is about 7/6=1.183 times bigger than the smaller solid in terms of side length. Since the surface area has a ratio of [tex](side length)^2[/tex], we can find the surface area of the larger solid by:

[tex]S = (1.183^2)(108 mm^2) \approx 147 mm^2[/tex]

Therefore, the surface area of the larger solid is approximately 147 mm². Answer: A.

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Jane and Jim collect coins. Jim has five more than twice the amount Jane has. They have 41 coins altogether. How many coins does Jim have? How many coins does Jane have?

Answers

Jane has 12 coins and Jim has 29 coins.

What is the equation?

We know that this is a word problem and the first thing that we have to do is to form the equation from the problem that have been given to us here. This is what we shall now proceed to do below.

Let the number of coins that Jane has be x

Number of coins that Jim has = 5 + 2x

Total number of coins = 41

Thus we have that;

x + 5 + 2x = 41

3x + 5 = 41

3x = 41 - 5

3x = 36

x = 12

This implies that Jane has 12 coins and Jim has 5 + 2(12) = 29 coins

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100%


A DVD player manufacturer shipped 960 DVD players last month. According to the manufacturer's records, 5 out of every 24 players were


repaired during the first year of ownership.


How many of the 960 DVD players were repaired in the first year?

Answers

If 5 out of every 24 players were repaired during the first year of ownership, then 200 of the 960 DVD players were repaired in the first year.

Based on the manufacturer's records, we know that 5 out of every 24 players were repaired in the first year of ownership. To find out how many out of the 960 DVD players were repaired in the first year, we can set up a proportion:

5/24 = x/960

To solve for x, we can cross-multiply:

5 * 960 = 24x

4800 = 24x

x = 200

Therefore, 200 of the 960 DVD players were repaired in the first year, which is approximately 20.8% of the total shipped.

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please help find uv 10 points like ill actually do anything for someone to respond fast please!! im bad at math

Answers

Answer:

0.8660

Step-by-step explanation:

sin24=opposite ÷hypotenus

sin24=opposite ÷5

cross multiply

sin24x5=opposite

sin24=0.4067x5

opposite =0.8660

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