A plane descends 4000 feet over a period of eight minutes. Find the plane's average rate of descent. Write a division expression to represent the situation. Then find the quotient and explain its meaning within the context of the problem.

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq less than 132. the probability that a randomly selected adult has an iq less than 132 is?