Question

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?

0 ≤ x ≤ 10

5 ≤ x ≤ 55

0 ≤ x ≤ 50

All positive integers

Answer 1

really not clear is it?

Answer 2

\(x\) represents minutes. How many minutes are there between 9:05 and 9:55.

Answer 3

The clock start at 9:05 AM.
This corresponds to x = 0

The clock stops at 9:55 AM
This correspond to x = ?

That values of x above will be the suitable domain for this function.

Answer 4

50 seconds is between 9:05 and 9:55

Answer 5

@SithsAndGiggles @aum

Answer 6

Yes.
The clock start at 9:05 AM.
This corresponds to x = 0

The clock stops at 9:55 AM
This correspond to x = 50

Therefore, the domain for this function is: \( 0 \le x \le 50\)

Answer 7

In your answer, the 50 is not in seconds but minutes.

Answer 8

o ok thx

Answer 9

yw.