Solve this math puzzle!

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)