Help me with this pls Which expression represents the volume of the cylinder in cubic inches?

A n x 6^2 x 18
B 6 x 18 x n
C 6 x 18^ n
D 2n x 6 x 18

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

How many times larger is 6 × 10^12 than 2 × 10^7? a. 30,000 b. 3,000 c. 3,000,000 d. 300,000

Need same math paper but the back now i hope your able to read it cleary i need with hw