Once an Antibiotic Is Introduced to Bacteria, the Number of Bacteria

Multiple Choice

Once an antibiotic is introduced to bacteria, the number of bacteria decreases exponentially. For example, beginning with 1 million bacteria, the amount present t days from the time penicillin is introduced is given by the function

Rounding to the nearest thousand, determine how many bacteria are present after 6 days.

A) 548,000
B) 0
C) 660,000
D) 601,000