3 years ago

Quadrilateral QRST is an isosceles trapezoid. Q(-3,-2); S(3,2); T(5,-2). what would point R be?

Mathematics

1 answer:

MariettaO [177]3 years ago

3 0

Here it is graphed... But I'm not sure what the x value of R would be... I know its Y value is 2

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The life in hours of a 75-watt light bulb is known to be normally distributed with standard deviation σ = 25 hours. A random sam

irina [24]

Answer: a) (1008.34,1019.658) b) (1009.24,1018.76)

Step-by-step explanation:

Since we have given that

n = 75

mean = 1014 hours

Standard deviation = 25 hours

At 95% two sided , z = 1.96

So, confidence interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.96\dfrac{25}{\sqrt{75}}\\\\=1014\pm 5.658\\\\=(1014-5.658,1014+5.658)\\\\=(1008.34,1019.658)$

(b) Construct a 95% lower confidence bound on the mean life.

z = 1.65

So, confidence interval would be

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.65\times \dfrac{25}{\sqrt{75}}\\\\=1014\pm 4.76\\\\=(1014-4.76,1014+4.76)\\\\=(1009.24,1018.76)$

Hence, a) (1008.34,1019.658) b) (1009.24,1018.76)

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3 years ago

<img src="https://tex.z-dn.net/?f=%20%5Ctan%28x%20%29%20%20%3D%20%20%5Cfrac%7B10%7D%7B60%7D%20" id="TexFormula1" title=" \tan(x

chubhunter [2.5K]

tan(x) = 10/60

tan(x) = 1/6

tan(x) = a -> x = arctan(a) + πn

x = arctan(1/6) + πn

x = 0.165 + πn

Best of Luck!

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Six different second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic re

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Naomi plans to attend a four-year college that costs a total of $21,800 per year. Her family invests $9,500 in an account that e

ki77a [65]

Answer:

its on google

Step-by-step explanation:

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3 years ago

Read 2 more answers

How do you write 7 29/80 (mixed number) to a decimal?

Finger [1]

A fraction can be viewed as a division problem, and a mixed number can be viewed as an addition problem. So,
7 29/80 can be read as:

7+29÷80

Follow the order of operations and you'll have your decimal.

7+29÷80
7+0.3625
7.3625

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3 years ago