The area of a compact disc is 78.53 square centimeters. What is the radius of the disc? Use pi = 3.14

Step-by-step explanation:

The area of a circle is found using this formula:

We know the area of the disc is 78.53 square centimeters and 3.14 is being used for pi.

We are solving for the radius, so we must isolate the variable r.

3.14 and r² are being multiplied. The inverse of multiplication is division, so divide both sides by 3.14

r is being squared, so we must take the square root of both sides.

The radius of the disc is about 5 centimeters.

10 miles

step-by-step explanation: