Question

The function f(x) = 50(1.2)x gives the number of bacteria in a science experiment, where x is the number of days after the start of the experiment. To the nearest whole number, how many bacteria will there be after 5 days?

a
124
b
300
c
375,000,000
d
777,600,000

Answer 1

a. 124

Explanation:

`f(x) = 50(1.2)^x`

x is the number of days. For 5 days, x = 5.

`f(5) = 50(1.2)^5`

`f(5) = 50(2.48832)`

`f(5) = 124.416`

Answer: 124