A raffle is being held to benefit the local animal shelter. They sell 717 tickets that do not win any prize, 19 tickets that win a free adoption (valued at $20), and one ticket that wins $166 worth of pet supplies and toys. If they are selling the tickets for $5 each, how much should the shelter expect to earn for each ticket sold?

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

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.

Me because i don't understand how to do it.: )