At 25°C the Rate Constant for the First-Order Decomposition of a Pesticide

At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40  10^-3 min^-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25°C?

A) 1.14  10^-1 M
B) 47.4 M
C) -8.72.0 M
D) 2.11  10^-2 M
E) 2.68  10^-2 M