Four doughnuts and 4 coffees cost $12. the cost of the 4 coffees is half the cost of the 4 doughnuts. what is the cost of each coffee? which of the following problems would you solve the problem above? a. what is the cost of each doughnut? b. what is the cost of the 4 coffees together? c. what is the cost of 8 doughnuts and 8 coffees? d. what is the cost of 2 doughnuts and 2 coffees?

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 between 80 and 120.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 between 80 and 120.