Solve the Problem $$A ( t ) = 608 e ^ { - 0.019 t }$$

Multiple Choice

Solve the problem.
-The decay of 608 mg of an isotope is given by A $$A ( t ) = 608 e ^ { - 0.019 t }$$ , where t is time in years. Find the amount left after 50 years.

A) 235 mg
B) 231 mg
C) 597 mg
D) 118 mg