Question

Type the correct answer in the box. Use numerals instead of words.

Answer 1

Using the surface area of the sphere, it is found that the radius of the bearing that Helen needs to buy is of 6 millimeters.

What is the surface area of a sphere?

The surface area of a sphere of radius r is given by:

$S_A = 4\pi r^2$

In this problem, we have that:

$S_A = 452.16$

Hence:

$4\pi r^2 = 452.16$

$r = \sqrt{\frac{452.16}{4\pi}}$

r = 6.

The radius of the bearing that Helen needs to buy is of 6 millimeters.

More can be learned about the surface area of a sphere at brainly.com/question/21207980

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