Write the equation of a circle that has a diameter of 12 units if its center is at (4,7).
A) (x+4)² + (y+7)² = 36
B) (x-4)² + (y-7)² = 144
C) (x+4)² + (y+7)² = 144
D) (x-4) ² + (y-7)² = 36

Having a hard time understanding this question (see attachment).

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.

Assume that females have pulse rates that are normally distributed with a mean of mu equals 72.0 beats per minute and a standard deviation of sigma equals 12.5 beats per minute. complete parts (a) through (c) below. a. if 1 adult female is randomly selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute. the probability is? b. if 16 adult females are randomly selected, find the probability that they have pulse rates with a mean between 65 beats per minute and 79 beats per minute. the probability is? c. why can the normal distribution be used in part (b), even though the sample size does not exceed 30?