(7^(7)*7^(0))/(7^(5)*7^(2) please can someone explain the answer!!!

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

When you answer this can you explain

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