SOLUTION: The circumference of a circle is 42 pi inches. What is the area of the circle to the nearest tenth of an inch? Which answer is it? a. 66.0 in.^2 b. 131.4 in.^2 c. 1185.

Question 635189: The circumference of a circle is 42 pi inches. What is the area of the circle to the nearest tenth of an inch?
Which answer is it?
a. 66.0 in.^2
b. 131.4 in.^2
c. 1185.4 in.^2
d. 1385.4 in.^2
Found 2 solutions by ewatrrr, richwmiller:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Hi,
The circumference of a circle is 42 pi inches. r = 21
A = = 1385.4 in^2
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
2*pi*r=42pi
r=21
pi*21^2
d) 1385 .4 in^2
RELATED QUESTIONS
the circumference of a circle is 56.52 inches, to the nearest tenth of an inch find the... (answered by bucky,josmiceli)
The circumference of a circle is 80 inches. Find the radius to the nearest tenth of an... (answered by rfer,checkley77)
The area of a circle is 18π square inches. What is the circumference of the circle... (answered by Alan3354)
To the nearest tenth, what is the area of a circle with circumference of 35.6... (answered by mananth)
The circumference of a circle is 18 pi. inches. Determine the area of the... (answered by rfer)
To the nearest tenth, the circumference of a circle with a radius of 3cm is... (answered by stanbon)
If a circle has a circumference of 32 pi inches, what is the area in terms of... (answered by ikleyn,Boreal,mathsolverplus)
To the nearest tenth, what is the circumference of a circle whose diameter is 8... (answered by Alan3354)
What is the area of a circle in terms of pi. The circumference is pi/2. (answered by ikleyn)