PLEASE HELP I need to finish this in 20 minutes

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1