Two factories blow their whistles at exactly the same time. If a man hears the two blasts exactly


4. 2 seconds and 5. 9 seconds after they are blown and the angle between his lines of sight to the two


factories is 40. 8°, how far apart are the factories? Give your result to the nearest meter. (Use the fact


that sound travels at 344 m/sec. )


A) 2903 meters


B) 3263 meters C) 1329 meters D) 1997 meters

Required Answer :

x(2x + 4)= x²+ 4 (9 - 3x)

2x² + 4x = x² + 36 - 12x

2x² - x² + 4x + 12x - 36=0

x² + 16x - 36=0

Quadratic equation in Standard form,

Using Quadratic formula,

[tex] \implies \sf x = \dfrac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a} \\ \\ \implies \sf x = \dfrac{ - 16 \pm \sqrt{ {16}^{2} - 4(1)( - 36)} }{2 \times 1} \\ \\ \implies \sf x = \dfrac{ - 16\pm \sqrt{256 - ( - 144)} }{2} \\ \\ \implies \sf x = \frac{ - 16 \pm \sqrt{256 + 144} }{2} \\ \\ \implies \sf x = \frac{ - 16 \pm \sqrt{400} }{2} \\ \\ \implies \sf x = \dfrac{ - 16 \pm20}{2} \\ \\ \implies \sf x = \dfrac{ - 16 \pm 20}{2} \\ \\ \implies \sf x = \dfrac{4}{2} \: or \: \dfrac{ - 36}{2} \\ \\ \implies \sf x = 2 \: or \: - 18[/tex]

Answer: x = -3

Step-by-step explanation:

Hope this helps.

The spring constant is 180 N/m.

To solve for the spring constant, we can use the equation: k = (m * g) / x
where k is the spring constant, m is the mass of the box, g is the acceleration due to gravity (9.8 m/s^2), and x is the compression distance of the spring.
First, let's get the final velocity of the box when it hits the spring. We can use the equation:
v^2 = u^2 + 2as
where v is the final velocity (0 m/s), u is the initial speed (3.0 m/s), a is the acceleration (which is constant and equal to -k/m since the force from the spring is in the opposite direction of the box's motion), and s is the compression distance of the spring (0.30 m).
Rearranging the equation, we get:
k/m = (u^2 - v^2) / (2s)
k/4.0 = (3.0^2 - 0^2) / (2 * 0.30)
k/4.0 = 45
k = 180 N/m
Therefore, the spring constant is 180 N/m.

Learn more about spring constant here, https://brainly.com/question/14670501

#SPJ11

The equation of the function h(x) from the transformation is h(x) = f(x + 1)

From the question, we have the following parameters that can be used in our computation:

The functions f(x), g(x) and h(x)

In the graph, we can see that

Horizontal Shift = 1 unit left

This is represented as

h(x) = f(x + 1)

This means that the transformation of f(x) to h(x) is f(x) is shifted left 1 unit to h(x).

Read more about transformation at

brainly.com/question/27224272

#SPJ1

The value of integral of (198r² + 9r – 50 dr  is  (16/27)ln|11r + 2| - (2/3)ln|9r - 4| + C

Now, we can write the integrand as a sum of two fractions:

(198r² + 9r - 50) / (11r + 2)(9r - 4) = A/(11r + 2) + B/(9r - 4)

To find A and B, we need to solve for them using the method of equating coefficients:

198r² + 9r - 50 = A(9r - 4) + B(11r + 2)

Setting r = 4/9 and r = -2/11, we get two equations:

198(4/9)² + 9(4/9) - 50 = A(9(4/9) - 4) + B(11(4/9) + 2)

198(-2/11)² + 9(-2/11) - 50 = A(9(-2/11) - 4) + B(11(-2/11) + 2)

Solving these equations gives A = 16/27 and B = -2/3.

So, the integral can be written as:

∫(198r² + 9r - 50) / (11r + 2)(9r - 4) dr = ∫16/27(11r + 2)^-1 dr - ∫2/3(9r - 4)^-1 dr

Integrating each term gives:

(16/27)ln|11r + 2| - (2/3)ln|9r - 4| + C

where C is the constant of integration.

In summary, using partial fraction decomposition, we can express the given integral as a sum of two simpler integrals, which can be evaluated using the natural logarithm function.

To know more about partial fraction decomposition click on below link:

https://brainly.com/question/30894807#

#SPJ11

The associations rhat are shown by the graph are

A graph depicting a negative linear association appears as points on the chart are concomitantly placed around a straight line that confidently descends from left to right. In simpler terms, there is a notable inverse correlation between the x and y variables, which can be best comprehended with the help of an illustration.

For instance, if one were to consider a dataset representing the age of an automobile (x) and its fuel efficiency in miles per gallon (y), a graph displaying a rigorous negative linear association implies that with an increase in the age of the car, its energy proficiency has an inclination to decrease.

Read more on linear association here: https://brainly.com/question/13828699

#SPJ1

Lara sold 3/5 of a box of candy, which is the same as 0.6 boxes of candy.

If Lucy sold 3/5 of a box of candy, then Lara sold 1/5 of 3/5, which is:

(1/5) * (3/5) = 3/25

Therefore, Lara sold 3/25 of a box of candy.

To find the number of boxes Lara sold, we can divide 3/25 by 1/5:

(3/25) ÷ (1/5) = (3/25) * (5/1) = 15/25 = 3/5

So Lara sold 3/5 of a box of candy, which is the same as 0.6 boxes of candy.

Learn more about the box of candy

brainly.com/question/14936478

#SPJ11

Answer:

The sum of all numbers divisible by 6 between 100 and 400 is 12450.

Step-by-step explanation:

I think this is correct.

If it isn't, I'm sorry.

Step-by-step explanation:

18 m = hypotenuse = c

5 m = b

a² + b² = c²

a² + (5)² = (18)²

a² + 25 = 324

a² = 324 - 25

a² = 299

a = √299

a = 17.29 or 17.3 m

perimeter = a + b + c

= 17.3 + 18 + 5

= 40.3 m

The equation for the line that passes through the point ( 3,-1/2) and is perpendicular to the line y =-2x+3 is:

y = (1/2)*x - 2

Remember that two linear equations are perpendicular if the product between the slopes is -1, here we want a line perpendicular to:

y =-2x+3

Then if the slope of our line is a, we must have that:

a*-2 = -1

a = 1/2

Then our line is something like:

y = (1/2)x + b

Now we also want our line to pass through (3, -1/2), then:

-1/2 = (1/2)*3 + b

-1/2 = 3/2 + b

-1/2 - 3/2 = b

-2 = b

The linear equation is:

y = (1/2)*x - 2

Learn more about linear equations at:

https://brainly.com/question/1884491

#SPJ1

The missing angles ;

22.6°

53.1°

28.1°

A right triangle is a type of triangle that has one of its angles measuring 90 degrees (a right angle). The side opposite to the right angle is called the hypotenuse, and the other two sides are called legs or catheti.

We have that;

[tex]Sin \alpha = 5/13\\ \alpha = Sin-1(5/13)\\ \alpha = 22.6[/tex]

[tex]Tan  \alpha = 16/12\\\alpha = Tan-1 (16/12)\\= 53.1[/tex]

[tex]Sin \alpha = 8/17\\\alpha = Sin-1(8/17)\\\alpha = 28.1[/tex]

Right triangles have many practical applications, such as in trigonometry, engineering, and architecture.

Learn more about triangle:https://brainly.com/question/2773823

#SPJ1

To use the Comparison Test, we need to find a series that we know is either always greater than or always less than our given series

. Since cosine values oscillate between -1 and 1, we know that 2 + cos(n) is always greater than or equal to 1. Therefore, we can compare our given series to the series 1/n, which we know is a p-series with p = 1 and is divergent.

Using the Comparison Test, we can say that since 1/n is divergent and 1/n ≤ 2 + cos(n) for all n ≥ 71.1, then the series 2 + cos(n) n 71.1 must also be divergent. Therefore, the series 2 + cos(n) n 71.1 is divergent.
Hi! To determine whether the series Σ(2 + cos(n)), where n ranges from 1 to infinity, is convergent or divergent using the Comparison Test, we need to compare it with another series whose convergence behavior is known.

Consider the series Σ(2), which is a constant series where every term is 2. This series diverges, as its partial sums keep increasing without bound. Since cos(n) is bounded between -1 and 1, we know that for every n, 1 ≤ (2 + cos(n)) ≤ 3.

Now, using the Comparison Test, we can compare Σ(2 + cos(n)) with Σ(2). Since Σ(2) is divergent and 2 + cos(n) is always greater than or equal to 2, we can conclude that the series Σ(2 + cos(n)) is also divergent.

Visit here to learn more about series  : https://brainly.com/question/18046467
#SPJ11

The correct answer is option B, a reflection over the y-axis followed by a translation of (1,y) → (1, y-6).

To solve this problem, we need to find the sequence of rigid motions (i.e., transformations that preserve distance and angle) that maps quadrilateral ABCD to quadrilateral EFGH.

First, we need to identify the corresponding vertices of the two quadrilaterals. Let's assume that vertex A maps to vertex E, vertex B maps to vertex F, vertex C maps to vertex G, and vertex D maps to vertex H.

Now, we can apply different transformations to map each vertex of quadrilateral ABCD to the corresponding vertex of quadrilateral EFGH. We can try each option provided and check if it maps all the vertices correctly.

Option A involves a reflection over the x-axis, followed by a translation of (0,y) → (0, y - 4). This transformation does not map vertex A to vertex E correctly.

Option B involves a reflection over the y-axis, followed by a translation of (1,y) → (1, y - 6). This transformation maps vertex A to vertex E, vertex B to vertex F, vertex C to vertex G, and vertex D to vertex H, which is the correct mapping.

Option C involves a translation of (+,y) → (2, y - 3) followed by a reflection over the y-axis. This transformation does not map vertex A to vertex E correctly.

Option D involves a translation of (1-6, y) followed by a reflection over the x-axis. This transformation does not map vertex A to vertex E correctly.

Therefore, the unique sequence of rigid motions that maps quadrilateral ABCD to quadrilateral EFGH is a reflection over the y-axis followed by a translation of (1,y) → (1, y-6), which is option B.

To know more about reflection refer here:

https://brainly.com/question/30270479

#SPJ11

Answer:3

Step-by-step explanation: We see that 217361.05 =217000+361.05 so our answer is 3

Answer: m*n

Step-by-step explanation:

Dilating the figure by a scale factor of 3, the new coordinates are:

A' (-3, 12)

B' (9, 6)

C' (5886, -6)

D (unknown)

To dilate a figure by a scale factor, we need to multiply the coordinates of each point by the scale factor. Given the scale factor K = 3, we can dilate the figure using the formula:

New x-coordinate = K * original x-coordinate

New y-coordinate = K * original y-coordinate

Let's apply this to the given coordinates:

(-1, 4)

New x-coordinate = 3 * (-1) = -3

New y-coordinate = 3 * 4 = 12

A' (-3, 12)

(3, 2)

New x-coordinate = 3 * 3 = 9

New y-coordinate = 3 * 2 = 6

B' (9, 6)

(1962, -2)

New x-coordinate = 3 * 1962 = 5886

New y-coordinate = 3 * (-2) = -6

C' (5886, -6)

Dilating the figure by a scale factor of 3, the new coordinates are:

A' (-3, 12)

B' (9, 6)

C' (5886, -6)

D (unknown)

To know more about coordinates

https://brainly.com/question/20362114

#SPJ11

We know that after 36 months, Martin will have to pay Richard P193,969.

Hi! Based on your question, Richard lends P154,600 to Martin at an 8.5% simple interest rate per annum, and the debt is payable after 36 months. To find out how much Martin will have to pay Richard after 36 months, we'll first calculate the interest.

Simple Interest = Principal × Rate × Time
Interest = P154,600 × 8.5% × (36 months / 12 months per year)
Interest = P154,600 × 0.085 × 3
Interest = P39,369

Now, add the interest to the principal to find the total amount Martin needs to pay Richard:
Total Amount = Principal + Interest
Total Amount = P154,600 + P39,369
Total Amount = P193,969

After 36 months, Martin will have to pay Richard P193,969.

To know more about pay refer here

https://brainly.com/question/14690804#

#SPJ11

The biologist predicts that the population would be fewer than 50 in approximately 30 years from the initial count.

The biologist likely used the exponential decay function to model the coyote population over time. This function takes the form:

P(t) = P0 * (1 - r)^t

Where:
P(t) is the population at time t,
P0 is the initial population (100 coyotes),
r is the rate of decrease (0.045 or 4.5%),
t is the time in years.

To predict when the population would be fewer than 50, the biologist would solve the equation:

50 = 100 * (1 - 0.045)^t

t = 30

This equation can be used to find the value of t, which represents the number of years it takes for the population to decrease to fewer than 50 coyotes in the tri-county area, which is 30 years.

More on population: https://brainly.com/question/504387

#SPJ11

Rate of change in the temperature of lasagna given by function T(t) = 70 + (200 - 70) × [tex]e^{(-0.0001t)}[/tex] exactly 2 hours after taking it out of oven is -0.013 °F/hour.

Surrounding room temperature is equal to 70°F

Temperature at which lasagna comes out of the oven = 200°F

The temperature T (in °F) of the lasagna at time t (in hours) after taking it out of the oven is equal to,

T(t) = 70 + (200 - 70) × [tex]e^{(-0.0001t)}[/tex]

To find the rate of change in the temperature of the lasagna exactly 2 hours after taking it out of the oven,

Find the derivative of the temperature function with respect to time t.

T'(t) = -0.013[tex]e^{(-0.0001t)}[/tex]

Substituting t = 2 into this expression gives:

T'(2) = -0.013[tex]e^{(-0.0001\times 2)}[/tex]

= -0.013[tex]e^{-0.0002}[/tex]

= -0.013 × 0.99980

= -0.0129974

= -0.013

Therefore, the rate of change in the temperature of the lasagna exactly 2 hours after taking it out of the oven is approximately -0.013 °F/hour.

learn more about temperature here

brainly.com/question/31150261

#SPJ4

The given question is incomplete, I answer the question in general according to my knowledge:

A tray of lasagna comes out of the oven at 200°F and is placed on a table where the surrounding room temperature is 70°F. The temperature T (in °F) of the lasagna is given by the function T(t) = 70 + (200 - 70) × [tex]e^{(-0.0001t)}[/tex] where t is time(in hours) after taking the lasagna out of the oven. What is the rate of change in the temperature of the lasagna exactly 2 hours after taking it out of the oven?

The length of chord segment EG = 6 inches and the length of FG = √23 inches.

Given, chord EG = 8 inches and the distance from the center of J to the chord is 3 inches.

We can draw a diagram as follows:

              J

            /   \

           /     \

          /       \

         /         \

        E-----------G

              |

              |

              |

              |

              |

              F

Here, OJ is perpendicular to chord EG at point F.

As per the theorem, the length of the perpendicular from the center of the circle to a chord is half the length of the diameter intersecting the chord.

So, we can find the length of the diameter intersecting chord EG and then use it to find the radius of the circle.

Length of chord EG = 8 inches

Length of OJ = 3 inches

Using Pythagorean theorem in right triangle OFG, we get:

OG² = OF² + FG²

Let x be the length of FG

We know that OF = OJ = 3 inches

OG = radius of the circle

So, we have:

radius of circle = OG = √(OF² + FG²) = √(3² + x²)

The diameter of the circle = 2(radius) = 2√(3² + x²)

Now, using the theorem mentioned above, we can say:

Length of perpendicular from the center of the circle to chord EG = OF = 3 inches

Length of diameter intersecting chord EG = 2√(3² + x²)

So, we get:

Length of chord segment EG = 2 * length of perpendicular

                            = 2 * 3 inches

                           = 6 inches

Now, we know that the chord segment EG divides the diameter intersecting it into two equal parts.

So, we have:

Length of one part of the diameter = (2√(3² + x²))/2 = √(3² + x²)

Using Pythagorean theorem in right triangle OJF, we get:

OJ² + JF² = OF²

3² + JF² = 8²

JF² = 8² - 3² = 55

JF = √55

Using Pythagorean theorem in right triangle JFG, we get:

JG² + FG² = JF²

(√(3² + x²))² + x² = 55

9 + x² + x² = 55

2x² = 46

x² = 23

x = √23

Therefore, the length of chord segment EG = 6 inches and the length of FG = √23 inches.

To know more about chord refer here:

https://brainly.com/question/8944240

#SPJ11

The term which is important in terms of making meaning of those scores is measures of central tendency (mean, median, mode), option A.

A single number that seeks to characterise a set of data by pinpointing the centre location within that set of data is referred to as a measure of central tendency. As a result, measurements of central location are occasionally used to refer to measures of central tendency.

These also fit within the category of summary statistics. You are probably most familiar with the mean (sometimes known as the average), but there are additional central tendency measures, including the median and the mode.

The mean, median, and mode are all reliable indicators of central tendency, however depending on the situation, certain indicators are more useful than others.

Learn more about central tendency:

https://brainly.com/question/17631693

#SPJ4

Answer:

First, we need to calculate the control limits for the X-chart. Since the sample size is 4, the standard deviation of the sample mean is:

σ/√n = 2/√4 = 1

The 3σ control limits for the X-chart are:

Upper Control Limit (UCL) = 8 + 3(1) = 11

Lower Control Limit (LCL) = 8 - 3(1) = 5

Next, we need to find the probability that a point falls outside the control limits when the process mean shifts to 9. This can be calculated using the Gaussian distribution:

P(X < 5 or X > 11) = P(Z < (5-9)/2) + P(Z > (11-9)/2) = 0.00135 + 0.00135 = 0.0027

where Z is the standard normal distribution.

Therefore, the average run length (ARL) is:

ARL = 1/p = 1/0.0027 = 370.37

So on average, it will take 370.37 samples before the process mean shift is detected on an X-chart.

The house is currently 6 years old.

It is mentioned that when the mortgage is completely paid off for Mark and Lynne's house, it will be 3 times as old as it is now. They have 12 years left on the mortgage.

Let's denote the current age of the house as x. When the mortgage is paid off, the house will be x + 12 years old (since they have 12 years left on the mortgage). At that point, the house will be 3 times its current age, so we can write the equation:

x + 12 = 3x

Now we can solve for x:
12 = 2x
x = 6

So, the house is currently 6 years old.

Learn more about "mortgage": https://brainly.com/question/1318711

#SPJ11

Note that the point ( 1 , 92 ) (1,92) represents the estimated number of people in the hall at 7pm.

This is based on the given graph.

Note tha the horizontal axis  = x = 0

which corresponds to 6pm

the vertical is the number of scanned tickets.

Also, the pont (1, 92) is the line of best fit so that means that at 7pm which is a n hour after 6pm, there were about 92 persons still in the hall.

Hence we are correct to state that  the point ( 1 , 92 ) (1,92) represents the estimated number of people in the hall at 7pm.

Learn more about graphs:
https://brainly.com/question/17267403
#SPJ1

Full Question:
See attached image/graph

The answer is (d) a convenience sample.

This is because the sample is not randomly selected from the population of all students at Ross College. Instead, it relies on individuals who are willing and available to respond to the question through the methods provided by the newspaper.

Therefore, the sample is more likely to be composed of individuals who feel strongly about the issue of student parking or who have had particularly positive or negative experiences with it, rather than being representative of the entire population of Ross College students.

In conclusion, the Ross Times student newspaper's feature column asking for opinions on the provision of student parking at Ross College represents a convenience sample of responses, and may not be representative of the entire population of Ross College students.

To know more convenience sample about refer here:

https://brainly.com/question/1413932

#SPJ11

An author can show indirect characterization through a character's thoughts, feelings, actions, and the setting of the story, as well as through their effect on others and their role in the rising action of the plot.

All of these elements can provide insights into a character's personality, motivations, and values, without the author explicitly stating them.

By carefully observing the character's interactions with others, their reactions to events, and the situations in which they find themselves, readers can draw conclusions about who the character is and what drives them.

Learn more about characterization

https://brainly.com/question/1393329

#SPJ4

Answer:

In an isosceles right triangle, the length of the diagonal is √2 times the length of a leg.

c = 6√2 in. = 8.5 in.

An equation that express each relationship for the joint variation is X = kyz. Solving for y will give the equation y = X/(kz)

Joint variation is a mathematical concept that describes the relationship between two or more variables. 

If X varies jointly as y and z, we can express this relationship mathematically using the formula:

X = k × y × z

X = kyz

where k is a constant of proportionality.

We can solve for y by dividing both sides by kz follows:

X/kz = kyz/kz

X/(kz) = y

Therefore, the equation that express each relationship for the joint variation is X = kyz. And the equation solved for y is y = X/(kz).

Read more about joint variation here:https://brainly.com/question/16455054

#SPJ1

Answer:

x = 7 is not a function--it is a vertical line.