The Rate Constant for the Decomposition Reaction of H₂O₂ Is $\to$

The rate constant for the decomposition reaction of H₂O₂ is 3.66 $\to$ 10^-3 s^-1 at a particular temperature.What is the concentration of H₂O₂ (34.01 g/mol) in a solution that was initially 30.0% H₂O₂ by mass (1.135 g/mL) after 15.0 minutes have passed?

A) 9.47 M
B) 0.270 M
C) 0.0371 M
D) 0.371 M
E) 3.29 M