Clara is asked to find the surface area of a sphere which has radius r, of 18 in. She says the surface area is 226.08 in. squared. What is the surface area of the sphere? What is Clara 's likely error? Use 3.14 for pi.

The surface area of the sphere is about

(Type an integer or decimal rounded to the nearest hundredth as needed.)

What is Clara 's likely error?

A.

Clara did not multiply by 3.14.

B.

Clara did not multiply by four when solving.

C.

Clara did not square the radius when solving.

Question

Mathematics

Guest

9 July, 10:51

Clara is asked to find the surface area of a sphere which has radius r, of 18 in. She says the surface area is 226.08 in. squared. What is the surface area of the sphere? What is Clara 's likely error? Use 3.14 for pi.

The surface area of the sphere is about

(Type an integer or decimal rounded to the nearest hundredth as needed.)

What is Clara 's likely error?

A.

Clara did not multiply by 3.14.

B.

Clara did not multiply by four when solving.

C.

Clara did not square the radius when solving.

+1

Answers (1)

Know the Answer?

Sariah Duarte · Answer 1

The surface area of the sphere is approximately 4071.5.

Step-by-step explanation:

You can find the surface area of a sphere using this formula: A=4πr^2!

Answer:

C. Clara did not square the radius when solving.

Step-by-step explanation:

She likely solved it like so:

18 x 3.14 = 56.52

56.52 x 4 = 226.08

Through this process, she forgot to square the radius!