After T Hours on the Job,a Factory Worker Can Produce $150 t e ^ { - 0.5 t }$

Multiple Choice

After t hours on the job,a factory worker can produce $150 t e ^ { - 0.5 t }$ units per hour.How many units does the worker produce during the first 4 hours? Round to two decimal places.

A) 843.60 units
B) 397.00 units
C) 356.40 units
D) 243.60 units