SOLUTION: A balloon has a circumference of 28 in. Use the circumference to approximate the surface area of the balloon to the nearest square inch.

Question 982676: A balloon has a circumference of 28 in. Use the circumference to approximate the surface area of the balloon to the nearest square inch.

Found 2 solutions by Alan3354, Cromlix:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A balloon has a circumference of 28 in. Use the circumference to approximate the surface area of the balloon to the nearest square inch.
-----------
Find the radius.

Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
Using Surface Area = 4 x pi x r^2
Circumference = 2 x pi x r
28 = 2 x pi x r
28/2 x pi = r
radius = 4.5ins
Surface Area = 4 x pi x 4.5^2
Surface Area = 254.5 ins^2
Surface Area = 255 ins^2 (to nearest square inch)
Hope this helps:-)
RELATED QUESTIONS
what is the surface area of a balloon with a circumference of 17... (answered by scott8148)
Ren inflates a spherical balloon to a circumference of about 14 inches. He then adds more (answered by Alan3354,ikleyn)
The radius of a spherical balloon is four times that of another balloon. If the surface... (answered by Alan3354)
Solve. Use 3.14 for 𝜋. A hot air balloon is in the shape of a sphere. Find the... (answered by ikleyn)
A weather balloon is filled with hydrogen at the rate of 0.5 ft^3/s. Initially, the... (answered by josmiceli)
In order to double the capacity of a spherical balloon, by what percentage must the area... (answered by htmentor)
Find the surface area and volume of a sphere whose great circle has a circumference of 28 (answered by Boreal)
A spherical weather balloon is being inflated. The radius of the balloon is increasing... (answered by DrBeeee)
To the nearest tenth of a square inch, how much surface area is added to a spherical... (answered by jorel1380)