{Please Help!} :( If f(x) and f1(x) are inverse functions of each other and f(x)=2x+5, what is f-1(8)?
A.) -1
B.) 3/4
C.) 41/8
D.) 23

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.