Amy ran 8 miles. She recorded how long it took her to run each mile, rounded to the nearest 1/4 of a minute. How long did it take Amy to run her slowest and fastest mile combined?

16 minutes.

Step-by-step explanation:

Given that the:

Distance covered = 8 miles

And it took her to run each mile, rounded to the nearest 1/4 of a minute.

Since it is a minute ( 1 minute ), add 0.25 to 1 for the fastest and subtract 0.25 from 1 for the slowest.

That is, 1 + 0.25 = 1.25 for maximum time, and 1 - 0.25 = 0.75 for the minimum.

For the Army slowest , 8 × 0.75 = 6 minutes

For the Army fastest, 8 × 1.25 = 10

Amy runs her slowest and fastest mile combined by adding the value of the slowest to the value of the fastest.

10 + 6 = 16 minutes

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

mxb67

step-by-step explanation: