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natali 33 [55]
3 years ago
9

For women at hartford college, times to run 400 meters are normally distributed with a mean of 84 seconds and a standard deviati

on of 7 seconds. what percentage of the times are more than 91 seconds? more than 63 seconds?
Mathematics
1 answer:
pashok25 [27]3 years ago
4 0


z=(63-84)/3= -21/7= -3
P(x>63)=p(z > -3) = .9987 or 99.87%
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Please help this is hard math
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Answer:

y=-4x+2

Step-by-step explanation:

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6 0
2 years ago
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What is the volume of this figure?
sattari [20]

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1323 cubic inches

Step-by-step explanation:

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2 years ago
Angle 3 and angle 4 are supplementary angles. Angle 3 is 88. What is the measure of angle 4?
Mademuasel [1]
Since angles 3 and 4 are supplementary, they add up to 180 degrees.

Angle 3 is 88 degrees.

To get the measure of the last angle, let's subtract 88 from 180.

180 - 88 = 92

Thus, Angle 4 has a measure of 92 degrees.

Have an awesome day! :)
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8 0
3 years ago
f(x) = 500(1.05)x What was the average rate of change of the value of Sophia's investment from the second year to the fourth yea
hjlf
\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\
f(x)=500(1.05)^x   \qquad 
\begin{cases}
x_1=2\\
x_2=4
\end{cases}\implies \cfrac{f(4)-f(2)}{4-2}
\\\\\\
\cfrac{[500(1.05)^4]~-~[500(1.05)^2]}{4-2}\implies \cfrac{56.503125}{2}\implies 28.2515625
6 0
3 years ago
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