Answered

A balloon has a circumference of 23 cm. Use the circumference to approximate the surface area of the balloon to the nearest square centimeter.


168 cm2

674 cm2

529 cm2

1,662 cm2

Verified Answer :

Johnson021

I think find the volume of the circumference

Answer:

168  cm2

Step-by-step explanation:

hello

the circumference is given by the formula

\(c=2*\pi *radius\)

where

\(r=\frac{C}{2*3.1516} \\r=\frac{23}{2*3.1516} \\r=3.66 cm\\\\\)

now with the radius of the balloon we can calculate the Surface area

\(s.a= 4\pi *r^{2} \\s.a= 4\pi *3.66^{2} \\s.a= 4\pi *13.39\\s.a.=4*3.1415*13.39\\\)

S.A.=168 square centimeters approximately

Have a great day

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