What reciprical power would you use to cancel the rational exponent 1/3

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3

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?