Question

A material has an initial quantity of 20 units. Which equation models the amount of material, y, growing exponentially at a rate of 17% for time, x.

Answer 1

y = 20(1.17)^x

(Here 1.17 = 1 + 0.17 is the growth factor per unit time. If growth were continuous, the model would be y = 20 e^{0.17x}.)