In a growth period, a population of flies triples every week. If the original population had 3 flies, how big is the population after 4 weeks?

The value of varies directly with the square of __and the cube of . If when and , then what is the value of _ when and ?

Phillip can paint square feet of wall per minute. What area of the wall can he paint in 2.5 hours?

varies directly as and inversely as ; and . Assuming that no other variables affect , which statement is true of concerning its relationship to ?

varies directly as both and the cube of . Which statement is true of concerning its relationship to ?