What is the length of the midsegment of this trapezoid? enter your answer in the box. units trapezoid a b c d on the coordinate plane. the vertices of the trapezoid are a begin ordered pair negative (11,3), b begin ordered pair (0,3), c begin ordered pair (-1,-2), and d begin ordered pair (-8,-2).

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?