What is the relationship among the numbers and symbols in the expression 24 ÷ (3 + 5)? Choose all answers that are correct. A. Twenty-four is split into 3 plus 5 parts. B. Twenty-four is split into 3 parts and increased by 5. C. The expression has a value that is 24 times as much as 3 plus 5. D. Twenty-four is divided into the number of groups equal to the sum of 3 and 5.

For each proportion find the unknown number x 1/5/8=×/15

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

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?