Hi im new and I need help with my math homework. I have tried 6(small 3)g(small 3) and other ways and it just doesn't work.

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

The ratio of the height of two similar cylinders is 4 to 3 what is the ratio of their volumes