Which equations could be used to solve the problem?
A balloon, with a final volume of 40 cm3, took 4 min to fill. At what rate was the balloon filled?
Choose exactly two answers that are correct.
A.40 cm3 • r = 4 min
B.r – 4 h = 14 in.
C.40 cm3 = 4 min • r
D. 40*cm3/4 min=r