In order to find the area of the lateral side of the cylinder, multiply the _ by the _ of the base.
If someone could fill in the blanks I would appreciate it!

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis

What function has a range {yly< 5}? question on picture above^