Sin the previous exercise, suppose the lengths of phone calls to the receptionist of a small company are i. i.d. with a mean of 5 minutes and an sd of 8 minutes. let ,… be the lengths of calls in minutes, and let =∑= be the sample average length. in each of the following parts, either find the chance exactly, or approximate it, or bound it. do the best you can with the information given. a) p(|−5|< 4)

i do not understand what you are trying to ask

Step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length