Question

The function f(x) = 5(2)^x represents the number of bacteria, f(x), growing in a culture after x hours. How many bacteria are in the culture after 3 hours?

A) 40
B) 80
C) 120
D) 160

Answer 1

The number of bacteria in the culture after 3 hours is 40.

Step-by-step explanation:

The function f(x) = 5(2)^x represents the number of bacteria, f(x), growing in a culture after x hours. To find the number of bacteria in the culture after 3 hours, substitute x = 3 into the function:

f(3) = 5(2)^3 = 5(8) = 40

Therefore, there are 40 bacteria in the culture after 3 hours.