What is a equivalent expression for 5w-15

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3

Iknow the answer but the calculator doesn't seem to give the right one

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)