Question

A balloon has a circumference of 17 cm. Use the circumference to approximate the surface area of the balloon to the nearest square centimeter.
a.
92 cm2
b.
368 cm2
c.
908 cm2
d.
289 cm2

Answer 1

I like balloons

Answer 2

@Loves_Leggings lols me too

Answer 3

surface area of the balloon = 4 pi r^2 where r = radius

the circumference = 2 pi r
so
17 = 2 pi r

now solve for r

then plug this value into the formula for the surface area

Answer 4

thanks @welshfella