What is the surface area of the cylinder? the diameter is 18ft and the height is 12ft.
540π ft^2
378π ft^2
216π ft^2
594π ft^2

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?