The number of bacteria in a sample increased by a factor of 2 every minute from 9: 05 am to 9: 55 am. the function below shows the number of bacteria in the sample f(x) after x minutes from 9: 05 am.. f(x) = 10(2)x. which of the following is a reasonable domain for the function? a. 0 ≤ x ≤ 10 b. 5 ≤ x ≤ 55 c. 0 ≤ x ≤ 50 d. all positive integers