HELP I need a answer

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

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