College Math Placement Practice Test

Question: 1 / 400

What is the area of a circle with a radius of 4?

8π

12π

16π

To determine the area of a circle, the formula used is \( A = \pi r^2 \), where \( A \) represents the area and \( r \) is the radius of the circle.

In this case, the radius given is 4. Plugging this value into the formula, we calculate the area as follows:

1. Square the radius: \( 4^2 = 16 \).

2. Multiply by \( \pi \): \( A = \pi \times 16 = 16\pi \).

Thus, the area of the circle is \( 16\pi \). This correctly identifies option C as the answer.

Other options suggest computations that either arise from incorrect squarings of the radius or misunderstandings of how to apply the area formula for a circle.

Get further explanation with Examzify DeepDiveBeta

20π

Next Question

Report this question

Download College Math Placement Practice Test PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy