The Rate Constant for the First-Order Decomposition of C₄H₈ at 500

Multiple Choice

The rate constant for the first-order decomposition of C₄H₈ at 500 ^$\circ$ C is 9.2 * 10^-3 s^-1. How long will it take for 10.0% of a 0.100 M sample of C₄H₈ to decompose at 500 ^$\circ$ C

A) 11 s
B) 14 s
C) 18 s
D) 22 s
E) None of the above