Question

A ball is dropped from the top of a building that is 1,000 feet high. Its height, in feet, as a function of the

time, x, in seconds, after the ball was dropped, is given by the following equation, f(x) = 1,000 - 16x2.
Which set of numbers is appropriate as the domain for this function?
Positive Integers
Positive Real Numbers
Natural Numbers
Positive Rational Numbers

Answer 1

Answer is positive real numbers

Answer 2

Positive real numbers

Explanation:

The time is not limited to rational numbers or integers. Natural numbers are a subset of integers. So the domain is positive real numbers.