7
QuizMultiple Choice

Cumulative Exam — Cumulative exam

Question 7 • EA Pre-Calculus Credit Recovery

Which function is NOT continuous?

Answer
A
Your altitude as a function of time while flying from Reno to Dallas.
B
Time of travel from Miami to Pensacola as a function of driving speed.
C
Number of tennis balls that can fit completely inside a particular box as a function of the radius of the tennis balls.
D
Area of a circle as a function of radius.

Explanation

The number of tennis balls that fit in a fixed box can only be a whole number. As the balls’ radius changes, the count stays the same over ranges, then jumps when the balls become too large to fit in the same arrangement, so this function is not continuous. The other quantities can vary continuously with time, speed, or radius.

AI-written and checked against the verified answer.

Previous
Next