Solve the Problem $\mathrm { D } ( \mathrm { h } ) = 5 \mathrm { e } ^ { - 0.4 \mathrm {~h} }$

Solve the problem.
-The function $\mathrm { D } ( \mathrm { h } ) = 5 \mathrm { e } ^ { - 0.4 \mathrm {~h} }$ can be used to determine the milligrams $\mathrm { D }$ of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams (to two decimals) will be present after 11 hours?

A) $407.25 \mathrm { mg }$
B) $1.49 \mathrm { mg }$
C) $3.09 \mathrm { mg }$
D) $0.06 \mathrm { mg }$