Answer: D. [0, 5]
Explanation:
Domain is all the x-values. It is given that x is seconds (time).
We know that time cannot be negative, so the lowest value x can be is 0, which represents the second it is about to be thrown. So, the minimum value of x is 0 (inclusive).
The ball hits the ground at 5 seconds. So it is no longer in the air after 5 seconds. The maximum x-value is 5 (inclusive).
Time can be measured in seconds, milliseconds, or any part of a second so there are no restrictions that require the x-values to be whole numbers.
Minimum of 0 (inclusive) and maximum of 5 (inclusive) is: [0, 5]