A microbiologist is studying the effects of a new antibiotic on a culture of 20,000 bacteria. When the antibiotic is added to the culture, the number of bacteria is reduced by half every. What king of function best models the number of bacteria remaining in the culture after the antibiotic is added?

Options

A. A linear function
B. A quadratic function
C. A polynomial function
D. An exponential function

Answer

D