Tasha is measuring the charge c (t) in a battery that has been charged for t minutes. Which of the following is the most appropriate domain for c (t) ?

A. Positive integers only

B. All real numbers

C. All positive numbers

D. All integers

C (t)

In a function the domain is all the values of t while the range is all the values of c (t).

Since t represents time in minutes, most appropriate domain for c (t) is A. Positive integers only.

Positive integers are numbers that starts with 1 and so on ...