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SpyIntel [72]
3 years ago
7

A and b are two similar shapes the area of shape a is 200 what is the area of shape b shape a is shown a length 12cm shape b is

shoe the length 15cm
Mathematics
1 answer:
Nesterboy [21]3 years ago
5 0
The area of shape b is 250
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Suppose the length of telephone calls form a normal distribution with a mean length of 8.0 min and a standard deviation of 2.5 m
ikadub [295]

Answer:

(A) 0.0013

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 8, \sigma = 2.5

The probability that telephone call selected a random will last more than 15.5 min is most nearly

This is 1 subtracted by the pvalue of Z when X = 15.5.

So

Z = \frac{X - \mu}{\sigma}

Z = \frac{15.5 - 8}{2.5}

Z = 3

Z = 3 has a pvalue of 0.9987

1 - 0.9987 = 0.0013

So the correct answer is:

(A) 0.0013

8 0
3 years ago
Which statement is false about the line whose equation is y=-2x-5?
Evgen [1.6K]
What are the choices
5 0
3 years ago
Pythagorean theorem
SpyIntel [72]
<span>the pythagorean theorem says the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides (when u add them together)</span>
6 0
3 years ago
Read 2 more answers
A blimp provides aerial tv views of a soccer game. The camera sights the stadium at a 7 degree angle of depression. The altitude
maria [59]

Given that,

The camera sights the stadium at a 7 degree angle of depression.

The altitude of the blimp i slide 300 m.

To find,

The line of sight distance from the camera to the stadium.

Solution,

If we consider a right angled triangle. Let x is its hypotenuse i.e. the line of sight distance from the camera to the stadium. Using trigonometry :

\sin\theta=\dfrac{P}{x}\\\\x=\dfrac{P}{\sin\theta}\\\\=\dfrac{300}{\sin7}\\\\=2461.65\ m

So, the line of sight is at a distance of 2461.65 m from the camera to the stadium.

6 0
3 years ago
PLEASE HELPP!<br> A square has an area of 5.76cm². Find the perimeter of the square
nikdorinn [45]
The ar. of square =X^
=5.76
So,X=√5.76
=2.4
now, perimeter of square =4(X)
=4(2.4)
=9.6
So, the perimeter of the square is 9.6cm..

Thanks!

Hope it helps you..
4 0
3 years ago
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