The shadow of a tower at a time is three times as long as its shadow when the angle of elevation of the Sun is 60°. Find the angle of elevation of the Sum at the time of the longer shadow.​

Answers

Answer 1

Answer:

[tex]30^{\circ}[/tex].

Step-by-step explanation:

Let [tex]\theta[/tex] denote the unknown angle of elevation. Let [tex]h[/tex] denote the height of the tower.

Refer to the diagram attached. In this diagram, [tex]{\sf A}[/tex] denotes the top of the tower while [tex]{\sf B}[/tex] denote the base of the tower; [tex]{\sf BC}[/tex] and [tex]{\sf BD}[/tex] denote the shadows of the tower when the angle of elevation of the sun is [tex]60^{\circ}[/tex] and [tex]\theta[/tex], respectively. The length of segment [tex]{\sf AB}[/tex] is [tex]h[/tex]; [tex]\angle {\sf ACB} = 60^{\circ}[/tex], [tex]\angle {\sf ADB} = \theta[/tex], and [tex]{\sf BD} = 3\, {\sf BC}[/tex]..

Note that in right triangle [tex]\triangle {\sf ABC}[/tex], segment [tex]{\sf AB}[/tex] (the tower) is opposite to [tex]\angle {\sf ACB}[/tex]. At the same time, segment [tex]{\sf BC}[/tex] (shadow of the tower when the angle of elevation of the sun is [tex]60^{\circ}[/tex]) is adjacent to [tex]\angle {\sf ACB}[/tex].

Thus, the ratio between the length of these two segments could be described with the tangent of [tex]m\angle {\sf ACB} = 60^{\circ}[/tex]:

[tex]\begin{aligned}\tan(\angle {\sf ACB}) &= \frac{\text{opposite}}{\text{adjacent}} = \frac{{\sf AB}}{{\sf BC}}\end{aligned}[/tex].

[tex]\begin{aligned}\frac{{\sf AB}}{{\sf BC}} = \tan(60^{\circ}) = \sqrt{3}\end{aligned}[/tex].

The length of segment [tex]{\sf AB}[/tex] is [tex]h[/tex]. Rearrange this equation to find the length of segment [tex]{\sf BC}[/tex]:

[tex]\begin{aligned} {\sf BC} &= \frac{{\sf AB}}{\tan(\angle ACB)} \\ &= \frac{h}{\tan(60^{\circ})}\\ &= \frac{h}{\sqrt{3}} \\ &\end{aligned}[/tex].

Therefore:

[tex]\begin{aligned}{\sf BD} &= 3\, {\sf BC} \\ &= \frac{3\, h}{\sqrt{3}} \\ &= (\sqrt{3})\, h\end{aligned}[/tex].

Similarly, in right triangle [tex]{\sf ABD}[/tex], segment [tex]{\sf AB}[/tex] (the tower) is opposite to [tex]\angle {\sf ADB}[/tex]. Segment [tex]{\sf BD}[/tex] (shadow of the tower, with [tex]\theta[/tex] as the angle of elevation of the sun) is adjacent to [tex]\angle {\sf ADB}[/tex].

[tex]\begin{aligned}\tan(\angle {\sf ADB}) &= \frac{\text{opposite}}{\text{adjacent}} = \frac{{\sf AD}}{{\sf BD}}\end{aligned}[/tex].

[tex]\begin{aligned}\frac{{\sf AB}}{{\sf BD}} = \tan(\theta) \end{aligned}[/tex].

Since [tex]{\sf AB} = h[/tex] while [tex]{\sf BD} = (\sqrt{3})\, h[/tex]:

[tex]\begin{aligned}\tan(\theta) &= \frac{{\sf AB}}{{\sf BD}} \\ &= \frac{h}{(\sqrt{3})\, h} \\ &= \frac{1}{\sqrt{3}}\end{aligned}[/tex].

Therefore:

[tex]\begin{aligned}\theta &= \arctan\left(\frac{1}{\sqrt{3}}\right) \\ &= 30^{\circ}\end{aligned}[/tex].

In other words, the angle of elevation of the sun at the time of the longer shadow would be [tex]30^{\circ}[/tex].

The Shadow Of A Tower At A Time Is Three Times As Long As Its Shadow When The Angle Of Elevation Of The

Related Questions

Help and you get pts

Answers

The line graph (C) represents the data representation on the line plot option (C) is correct.

What is a line graph?

A line graph is a graph made up of segments of straight lines that connect the depicted data points.

We have data shown in the table:

The data set value 11 repeated two times, so two dots we will see on the line plot.

The data set value 11(1/2) repeated one time, so one dot we will see on the line plot.

The data set value 11(3/4) repeated two times, so two dots we will see on the line plot.

The data set value 12 repeated two times, so two dots we will see on the line plot.

Similarly, we can check for others.

Thus, the line graph (C) represents the data representation on the line plot option (C) is correct.

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:)
which of the following is the solution to |x|+5≤1?

Answers

Isolating the absolute value term, we find

|x| + 5 ≤ 1   ⇒   |x| ≤ -4

However, the absolute value function maps every number x to a non-negative number, so |x| ≤ -4 is impossible and there is no solution to the inequality.

Which of the triangles shown are right triangles?

A group of triangles. Triangle A has two acute angles and one ninety degree angle. Triangle b has three equal angles. Triangle C has two acute angles and one obtuse angle. Triangle d has two acute angles and one ninety degree angle.

Group of answer choices

Triangle A and Triangle D

Answers

The right angle triangles are:

Triangle A has two acute angles and one ninety degree angle

Triangle d has two acute angles and one ninety degree angle.

What are right triangles?

A triangle is a three-sided polygon with three edges and three vertices. the sum of angles in a triangle is 180 degrees. A right angled triangle is a triangle in which one of its angles measure 90 degrees.

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What is the volume of a circular cake pan that measures 8 inches across and 2 inches high?

Answers

A circular cake pan that measures 8 inches across and 2 inches high. thus, the volume of a circular cake pan is 100.84 cubic inches.

What is the volume of the circular shape?

The volume of the circular shape can be calculated as the product of the area and the height.

Given; a circular cake pan that measures 8 inches across and 2 inches high.

The radius will be 4.

The area of the circle = [tex]\pi r^{2}[/tex]

[tex]\pi \times 4^2\\\\3.14\times 16\\\\50.24[/tex]

The volume of a circular cake pan = area x height

                                                     [tex]50.24 \times 2\\ \\100.48[/tex]

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What 2 operations are needed to solve 2x -4 =16

Answers

addition and division


to solve, we need to get X by itself on one side. since we have 3 numbers, 2x, -4, and 16, we can add -4 to 16 but not 2x because we dont know what 2x is.


so, we have to do an inverse operation.



add 4 to both sides


2x=20



then, since x is attached by multiplication we need to divide by 2 to get x by itself


20 divided by 2 is 10



x = 10

A bag contains​ pennies, nickels,​ dimes, and quarters. There are 50 coins in all. Of the​ coins, ​16% are pennies and ​34% are dimes. There are 2 more nickels than pennies. How much money does the bag​ contain?

Answers

Answer:
$6.03

Pennies:
50 X 0.16 (16%) = $0.08 (8 pennies) (1 penny = $0.01)

Nickels:
8 + 2 (8 pennies) = 10 nickels = $0.50 (1 nickel = $0.05 ($0.05 X 10))

Dimes:
50 X 0.34 (34%) = 17 dimes (1 dime = $0.10) so: $0.10 X 17 = $1.70

Quarters:
50 - 8 - 10 - 17 = 15 (1 quarter = $0.25)
So: $0.25 X 15 = $3.75

Total amount:
$0.08
$0.50
$1.70
$3.75 +
————
$6.03

24. Evaluate f(x) =
5x+25\
2x^2-50
when x = -5.

1
- 1 / 2
undefined
0

Answers

Answer:

undefined

Step-by-step explanation:

1. Input x = -5 in function f(x):

[tex]5(-5) + 25 / 2(-5)^{2} - 50[/tex]

[tex]-25+25 / 50 - 50[/tex]

[tex]0/0[/tex]

2. Determine the domain

[tex]0/0[/tex]

undefined

[tex]\Large\textsf{\textbf{Answer\::}}[/tex]

undefined

[tex]\Large\textsf{\textbf{Calculations\::}}[/tex]

Plug in the value of x (-5) and simplify as follows :

[tex]\displaystyle\frac{5(-5)+25}{2(-5)^2-50}[/tex]

[tex]\displaystyle\frac{-25+25}{2(25)-50}[/tex]

[tex]\displaystyle\frac{0}{50-50}[/tex]

[tex]\displaystyle\frac{0}{0}[/tex]

We know that we can't divide by zero. Dividing by zero results in infinity , which is not a number .

So the expression is :

[tex]\textsf{\textbf{und.efined}}[/tex]

[tex]\small\text{hope\:helpful~}[/tex]

Simplify the expression using the order of operations (12-8)^3-2*7+√36

Answers

Pull terms out from under the radical, assuming positive real numbers.

56

Have a good one :)

Find f(x) -g(x)
F(x)=-8x^3+1
g(x)=2x^3+6x+7

Answers

Answer: -10x³ - 6x - 6

Step-by-step explanation:

      f(x) -g(x) means we will subtract g(x) from f(x)


Given:

   (-8x³ + 1) - (2x³ + 6x + 7)

Distribute the negative:

   -8x³ + 1 - 2x³ - 6x - 7

Combine like terms, simplify:

   -10x³ - 6x - 6

         f(x) -g(x) is -10x³ - 6x - 6

Answer:

[tex]-10x^{3} -6x-6[/tex]

Step-by-step explanation:

The question is asking us to find f(x) - g(x). In the question it also gives the values of each as:

f(x) = [tex]-8x^{3} +1[/tex]

g(x) = [tex]2x^{3} +6x+7[/tex]

To find the answer, plug both of these values into f(x) - g(x):

([tex]-8x^{3} +1[/tex])-([tex]2x^{3} +6x+7[/tex])           Lets distribute the negative to [tex]2x^{3} +6x+7[/tex].

[tex]-8x^{3} +1[/tex] - [tex]2x^{3}-6x-7[/tex]             Combine like terms

[tex]-10x^{3} -6x-6[/tex]

Therefore, the final answer for f(x) - g(x) is equal to [tex]-10x^{3} -6x-6[/tex].

I hope this helps! If you have any questions about my work please put them in the comments below!

A lock has a two digit numeric code, with the numbers 1 through 6 available for each digit of the code. Note that numbers can be repeated in the code, so there are 6 possibilities for each of the two digits. Find the total number of possible codes for the lock.

Answers

there are 36 possible codes for this

Find the lateral area of the solid figure.



24√3
8√3
12√3

Answers

Answer:

Option C. 12√3

Step-by-step explanation:

Lateral area of the solid figure will be = 3×(one lateral side )

Area of a lateral side of the given triangle = (1/2) × (height) × (Base)

Height of an isosceles triangle with a side 4 will be = √(4² - 2²) = √(16-4)= √12 = 2√3

Now area of one lateral side = (1/2)×(2√3)×(4) = 4√3

Therefore lateral area of the solid figure = 3×(4√3) = 12√3

Jim 3 bought 3 hamburgers and 4 orders of french fries for $10.77 before taxes.
Chris went to the same restaurant and bought 4 hamburgers and 2 french fries for
$10.86 before taxes. What is the cost of one hamburger?

Answers

Answer:

The cost of one hamburger is $2.19.

Step-by-step explanation:

Let h = cost of a hamburger

f = cost of a french fries

3h + 4f = 10.77-------->3h + 4f = 10.77

4h + 2f = 10.86------->8h + 4f = 21.72

---------------------

5h = 10.95

h = 2.19, f = 1.05


Graph the line with slope 1/2
passing through the point (-4,1).

Answers

Answer:

from (-4,1) the line will go up to (-2,2) then (0,3)

Step-by-step explanation:

the slope 1/2 dictates that the line will go up by 1 unit for every 2 units, then we just plot said line from the point given (-4,1) where we go up y by 1 and we go left on x by 2

image could not be provided at this time, tho the line will have a slope that is between horizontal and increasing (to the left) at roughly 30 degrees ish

Identify the property of (-12)+12=0

Answers

Answer:

the anser is 0

this is an additive inverse property.

Step-by-step explanation:

Solve 7x-5=5x-4
Show Clear algebraic working

Answers

Answer:

See below

Explanation:
Add 5 to -4
7x=5x+1
Subtract 5x to 7x
2x=1
Divide by two
x=1/2

You want to exchange £750 for euros. These are the currency exchange rates from 3 different sources. Company Exchange rate Travel Exchange 1.1065 Phoenix Financial 1.1050 Money Matters 1.1075 Which gives you the best value for money?

Answers

Money Matters is the best value for money for £750 they are giving 806.25 euros.

What is Money exchange?

Customers can exchange one currency for another at a currency exchange, which is a licensed business.

The three agents are giving the money at different rates:-

Travel Exchange   =  750  x   1.1065  =   798.75 Euros

Phoenix Financial =   1.1050  x  750  =   787.5 Euros

Money Matters      =  1.1075  x   750  =    806.25 Euros

We can see that Money Matters is giving the best value for money.

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48 IS WHAT % OF 90
I forgot how to do this can anyone help

Answers

Answer:

tobe specific, it is 53.33%, but if you want just a whole #, it is 53%

Answer:

53.33%

Step-by-step explanation:

or 53% if rounded to the nearest whole

(5xy^2) (4x^8y^5)= what does it equal

Answers

Answer:

20x^9y^7.

Step-by-step explanation:

(5xy^2) (4x^8y^5)

= 5*4 x*x*8 y^2  *y^5

=  20x^9y^7.

original equation:

[tex](5xy^2)(4x^8y^5)[/tex]

when multiplying exponents, simply add the exponents of like bases.

[tex](5)(4)=20\\\\(x)(x^8)=x^9\\\\(y^2)(y^5)=y^7[/tex]

final answer

[tex](5xy^2)(4x^8y^5)=20x^9y^7[/tex]

The temperature in a town is 35.2°F during the day and -24.5°F at night. Find the difference in the temperatures

Answers

Answer:

[tex]\huge\boxed{\bf\:59.7^{\circ}\:F}[/tex]

Step-by-step explanation:

Temperature during the day = [tex]35.2^{\circ}F[/tex]

Temperature at night = [tex]-24.5^{\circ}F[/tex]

Difference in the temperatures

= Temperature during the day - Temperature at night

= [tex]35.2^{\circ}F - (- 24.5^{\circ}F)\\= 35.2^{\circ}F + 24.5^{\circ}F\\=\boxed{\bf\:59.7^{\circ}F}[/tex]

Difference in the temperatures = 59.7° F

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

Which of the following is a number that, when added to 5 , gives a result less than 13

Answers

The number that is given in the statement of this question is x<8.

Algebraic Expression

Algebraic expression is a mathematical sentence involving several numbers and letters. These letters are called variables or unknowns, and can be part of equations.

To solve this expression, we will set up the equation as follows, according to the statement.

*a number: x*added to 5: +5*result less than 13: < 13

x + 5 < 13

x < 13 - 5

x < 8

Therefore, the unknown number in this equation will be x < 8.

A train travels at a speed of 140km per hour. How many kilometers does it travel in:

a)1 hours b)2 hours c)3 hours d)20 minutes

Answers

Answer:

140kilo in 1hr and 280kilo in 2hr and 420kilo in 3hr and 28kilo in 20 min.

How Much Time Does It Take From 7:25 To 3:15

Answers

Answer:

7 hours 50 minutes and

Step-by-step explanation:

7.833 hours 470 minutes 28,200 seconds

Find the greatest common factor of 32 and 39

Answers

Answer:

1

Step-by-step explanation:

We will first find the prime factorization of 32 and 39. After we will calculate the factors of 32 and 39 and find the biggest common factor number .

32=2^5

39=3^1*13^1

-

List of positive integer factors of 32 that divides 32 without a remainder.

1,2,4,8,16

List of positive integer factors of 39 that divides 32 without a remainder.

1,3,13

We found the factors and prime factorization of 32 and 39. The biggest common factor number is the GCF number.

So the greatest common factor 32 and 39 is 1.

Elizabeth did a 1 hour workout 3 days a week for 5 months. How many total hours did Elizabeth workout?

Answers

Answer:

60 hours total

Step-by-step explanation:

1 hr x 3 days per week= 3 hrs a week

3 hrs x 4 weeks in a month =12 hrs a month

12 hrs ea month x 5 months = 60 hrs total

Write using exponential notation.
4•7•7•7•7

Answers

Answer:

4•(7^4)

Step-by-step explanation:

You would first do 7^4, and get 2401.

You would then multiply 2401 by 4, and get 9604.

Hope this helps! Added steps to solve it just in case :)

Answer:

[tex]4*7^{4}[/tex]

Step-by-step explanation:

The Exponential Notation is:

"A method of simplifying the writing and handling of very large or very small numbers."

The word "Exponential" comes from the word "Exponent"

So we have 1 four and 4 sevens and they are all being multiplied by each other.

Our operation: Multiplication

Our first number in the equation: 4

Our second number in the equation: 7 to the fourth power or [tex]7^{4}[/tex]

Our final answer: [tex]4*7^{4}[/tex]

I hope this helps!

Have a great day! :)

find the nth term
45,40,35,30...

Answers

Answer:

45,40,35,30,25,20,15...

Step-by-step explanation:

The common difference equals:

-5

The sum of the sequence equals:

150

The explicit formula of this sequence is:

a_n=45+(n-1)*(-5)

The recursive formula of this sequence is:

a_n=a_((n-1))-5

The nth terms:

45,40,35,30,25,20,15...

Hope this helps

Give brainliest :)

25 + 14 ÷ ( 5 - 3 )
its urgent please

Answers

Answer:

Step-by-step explanation:

25 + 14 / (5-3)

25 + 14 / 2

25 + 7

32

32 this calculation requires BIDMAS (brackets, indices, division, multiplication, addition, subratction)

If a fair die is rolled 6 times, what is the probability, to the nearest thousandth, of
getting exactly 5 ones?

Answers

Answer: 0.000

Step-by-step explanation:

From a height of 256 feet above a lake on a cliff, Mikaela throws a rock out over the lake. The height of
the rock + seconds after Mikaela throws it is represented by the equation H=-16t2 + 32+ + 256. To the nearest tenth
of a second, how long does it take the rock to reach the lake below? (Hint: replace h with 0)

Answers

The time taken by the rock to reach the lake below is 5.123 sec

t= 5.123 sec

What is quadratic equation?

A quadratic equation is an algebraic expression of the second degree in x. The quadratic equation in its standard form is [tex]ax^{2} +bx+c=0[/tex] where a, b are the coefficients, x is the variable, and c is the constant term.

It is given that,

H= [tex]-16t^{2} +32t+256[/tex], which represent the height of the rock

Also, we have given that the height of the cliff is 256 feet.

Now to find the time taken by the rock, take H=0

[tex]-16t^{2} +32t+256[/tex]=0

[tex]-16(t^{2} -2t-16) = 0[/tex]

[tex]t^{2} -2t-16 = 0[/tex]

Solve the above quadratic equation using Discriminant Method

[tex]t= \frac{-(b)\pm\sqrt{(b)^{2}- 4 *a*c } )}{2*a}[/tex]

From above equation, a=1, b=-2, c=-16

So,

[tex]t= \frac{-(-2)\pm\sqrt{(-2)^{2}- 4 *1*(-16) } )}{2*1}[/tex]

[tex]t= \frac{2\pm\sqrt{(4+64 } )}{2}[/tex]

[tex]t= \frac{2\pm\sqrt{(68 } )}{2}[/tex]

There will be two value one with positive [tex]t= -2+\sqrt{(68 } )[/tex] and another with negative [tex]t= -2-\sqrt{(68 } )[/tex]

We will neglect negative value because time can't be negative.

[tex]t= \frac{2+\sqrt{(68 } )}{2}[/tex]

[tex]t= \frac{2+8.246}{2}[/tex]

[tex]t= \frac{10.246}{2}[/tex]

t= 5.123 sec

The time taken by the rock to reach the lake below is t= 5.123 sec

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Find volume of a sphere with radius of 5

Answers

Answer:

532.33 [tex]units^3[/tex]

Step-by-step explanation:

Formula:

r* 4/3 * 3.14

Plug in radius:

[tex]5^3 * \frac{4}{3} * 3.14[/tex]   = 523.33

Answer:

523.33 in^3

Step-by-step explanation:

5^3 * 3.14 * 4/3

125 * 3.14 * 4/3

392.5 * 4/3

523.33

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