Ng, in
-After Taking a Certain Antibiotic, the Amount of Amoxicillin

ng, in
-After taking a certain antibiotic, the amount of amoxicillin A(t) , in milligrams, remaining in the patient's system t hr after taking 1,000 mg of amoxicillin is $A ( t ) = 1,000 e ^ { - 0.49 t }$ How much amoxicillin is in the patient's system 3 hr after taking the medication? Round to the nearest
Tenth of a mg.

A) 33.9 mg
B) 361.0 mg
C) 229.9 mg
D) 689.8 mg