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Eddi Din [679]
2 years ago
8

In the figure below, the segments WX and W Y are tangent to the circle centered at 0. Given that OX= 4 and OW = 8.5, find WY.

Mathematics
1 answer:
zheka24 [161]2 years ago
6 0

Answer:

7.5

Step-by-step explanation:

because OY is a radius like OX they will have equal length of 4 so OY = 4

Because of the circle theorem that says that tangents meet the the radius of a circle at 90 degrees, angle OYW is 90 degrees so the triangle OYW is a right angle triangle and we can use pythagoras theorem to get WY as:

8.5^{2} - 4^{2} = WY^{2}   \\\sqrt{WY^{2}}=WY=7.5

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The First National Bank of Wilson has 700 checking account customers. A recent sample of 50 of these customers showed 29 have a
attashe74 [19]

The margin of error is 0.137 and the confidence interval for the population proportion is (0.443, 0.717).

<h3>What is the margin of error(MOE)?</h3>

It is defined as an error that provides an estimate of the percentage of errors in real statistical data.

The formula for finding the MOE:

\rm MOE = Z\times \dfrac{s}{\sqrt{n}}

Where   Z is the z-score at the confidence interval

            s is the standard deviation

            n is the number of samples.

We have:

n = 50, X = 29,

Estimate point p = 29/50 = 0.58

q = 1-p = 1-0.58 = 0.42

Z at 0.05/2 (95% confidence interval) = 1.96

\rm MOE = 1.96\sqrt{\dfrac{0.58\times0.42}{50}}

After calculating:

MOE = 0.137

Confidence interval will be: (p - MOE, p+MOE)

= (0.58-0.137, 0.58+0.137)

= (0.443, 0.717)

Thus, the margin of error is 0.137 and the confidence interval for the population proportion is (0.443, 0.717).

Learn more about the Margin of error here:

brainly.com/question/13990500

#SPJ1

3 0
2 years ago
Simplify (3x + 5) + (2x - 9) - (4x+3).<br><br><br> A.) X-7<br> B.) -X-7<br> C.) 9x1<br> D) 9x1
erica [24]

Answer:

x -7

Step-by-step explanation:

(3x + 5) + (2x - 9) - (4x+3)

3x + 5 + 2x - 9 -4x -3

x -7

8 0
3 years ago
Read 2 more answers
Which statement is true about f(x) = -6|x+5| - 2?
Y_Kistochka [10]
Some schools do this differently, but since I don’t have any of the answer choices I’ll show you how to

Factor: -6|x+5|-2

Factor out the two

2(-3|x+5|-1)

And if you are looking for a graph here:

6 0
3 years ago
Someone help me please thanks
Svet_ta [14]
About 6 ;) ............
8 0
3 years ago
What are 3 expressions of 3/4x=15
Over [174]

Answer:

X=20

Step-by-step explanation:

7 0
3 years ago
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