Please help me answer this! Thank you:)

Write each expression in exponential form and find its value. 3 x 3 x 3

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7