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Scrat [10]
2 years ago
6

Matt looks at the architectural plan of a four-walled room in which the walls meet each other at right angles. The length of one

wall in the plan is 19 inches. The length of the diagonal of the floor of the room in the plan is approximately 20.62 inches.
Is the room in the shape of a square? Explain how you determined your answer. Show all your work.
Mathematics
1 answer:
IgorC [24]2 years ago
5 0

Answer:

No it is not a square.

Step-by-step explanation:

A square has 4 equal sides and 1 right angle (which means 4 right angles.

The Pythagorean Theorem would result is

19^2 + 19^2 = 722 if the figure was a square.

Since the diagonal of this figure is 20. 62^2 = 415.2, the diagonal isn't log enough for the figure to be a square.

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Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proporti
lesya [120]

Answer:

a) the sample size (n) = 156.25≅ 156

Step-by-step explanation:

<u>Step1 </u>:-

Given the two sample sizes are equal so n_{1} =n_{2} = n

Given the standard error (S.E) = 0.04

The standard error of the proportion of the given  sample size

S.E = \sqrt{\frac{pq}{n} }

Step 2:-

here we assume that the proportion of boys and girls are equally likely

p= 1/2 and q= 1/2

S.E = \sqrt{\frac{p(1-p)}{n} } \leq \frac{\frac{1}{2} }{\sqrt{n} }

\sqrt{n} = \frac{\frac{1}{2} }{S.E}

squaring on both sides, we get

n = \frac{1}{(2X0.04)^{2} }

on simplification, we get

n= 156.25 ≅ 156

sample size (n) = 156

<u>verification</u>:-

S.E = \sqrt{\frac{pq}{n} }= \sqrt{\frac{1}{4X156} } =\sqrt{0.0016}  

Standard error = 0.04

4 0
2 years ago
Mr. Singh needed to understand the trend of his students’ latest test scores. Find the mean and median for each set of data, and
marishachu [46]

Answer:

The Median should be 89.5

And the mean should be 69.75

I hope that helped

9 0
2 years ago
Read 2 more answers
A circular arena is lit by 5 lights equally spaced around the perimeter of the arena. What is the measure of each angle formed b
Artyom0805 [142]

Answer:

D. 108 degrees

Step-by-step explanation:

use the formula (n-2)180/n, n being number of sides.

In this case, the number of sides is 5.

plug it into the formula and solve:

(5-2)180/5

(3)180/5

540/5

108 degrees.

6 0
2 years ago
Read 2 more answers
Lines a and b are cut by transversal f. At the intersection of lines f and a, the top left angle is 96 degrees. At the intersect
Free_Kalibri [48]

Answer:

C. 22

Step-by-step explanation:

Inverse Alternate Interior Angles Theorem sttes that if two lines a and b are cut by transversal f so that the alternate interior angles are congruent, then a║b.

To prove that lines a and b are parallel, equate the measures of angles 96° and (6x-36)°:

6x-36=96\\ \\6x=96+36\\ \\6x=132\\ \\x=22

6 0
2 years ago
Read 2 more answers
The histogram to the right represents the weights​ (in pounds) of members of a certain​ high-school programming team. What is th
AVprozaik [17]

Answer:

Class width=20

Lower class limit of first class=100

Upper class limit of first class=120

Step-by-step explanation:

The class width can be calculated by taking the difference of two consecutive upper class limits or lower class limits.

Now we take any two consecutive upper class limits or lower class limits from classes 100-120,120-140,140-160,160-180,180-200,200-220,220-240.

We take upper class limits of first and second class i.e. 100 and 120.

Class width=120-100=20

Class width=20

The approximate lower and upper class limits of the first class from classes  100-120,120-140,140-160,160-180,180-200,200-220,220-240 are 100 and 120.

Class limits for first class is 100-120.

Lower class limit of first class=100

Upper class limit of first class=120

4 0
1 year ago
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