The Circumference and area of a circle of radius r are givin by 2 [pie] r and [pie] r[2], respectively use 3.14 for the constant [pie]

Solve these problems.

A. C = 2*2*3.14

B. A = 3.14*2*3.14*2

C. C = 3.14*2*3960

We'll be glad to check your answers.

A. C = 12.14?

B. A = 18.84. 28?

C. C = 24868.8?

A. Please do the multiplication again. You're close but not right.

B. I mistyped the formula above. It should be:
A = 3.14*2*2

C. You're right! :-)

A. C= 12.56

B. A= 12.56

C. Alright!

Yay! You have all of them right now. The only addition is that the answer to B is 12.56 square meters.

To find the answers to these questions, we will use the formulas provided for the circumference and area of a circle. Let's go through each question step by step:

A. What is the circumference of a circle with a radius of 2 m?
To find the circumference, we will use the formula 2πr where π is a constant.
Substituting the given values, we get:
Circumference = 2 * 3.14 * 2 m = 12.56 m

Therefore, the circumference of a circle with a radius of 2 m is 12.56 m.

B. What is the area of a circle with a radius of 2 m?
To find the area, we will use the formula πr².
Substituting the given values, we get:
Area = 3.14 * (2 m)² = 12.56 m²

Therefore, the area of a circle with a radius of 2 m is 12.56 square meters.

C. The earth has a radius of about 3960 miles. Approximately how long is the equator?
To find the length of the equator, we will use the formula for the circumference of a circle.
Substituting the given radius value, we get:
Circumference = 2 * 3.14 * 3960 miles ≈ 24,879.84 miles

Therefore, approximately, the length of the equator is 24,879.84 miles.

Note: In questions involving π, use of π as a constant is often approximated as 3.14. However, it is important to remember that π is an irrational number and its decimal representation is infinite.