An official volleyball measures 27 inches in circumference. find surface area.

Question

anonymous · Answer

that's for the circumference.

campbell_st · Answer

so you need to find the radius

so then the circumference formula is 

$$C = 2\pi r$$

in your question you have 

$$27 = 2 \pi r$$

make r the subject... 

when you have the value of r substitute it into the formula for surface area of a sphere

$$SA = 4\pi r^2$$

anonymous · Answer

4pir^2
4*3.14(27/2)^2
12.56(13.5)^2
12.56*182.25
2,289.06

anonymous · Answer

thanks :)

campbell_st · Answer

I think your value for the radius is incorrect @heathernelly

anonymous · Answer

a bathroom floor tile measures 6 in on a side. if the whole floor contains 100 tiles, what is the area of the bathroom floor in square ft. Note: 1 ft = 12in

campbell_st · Answer

well go back to the circumference formula and make r the subject... correctly...

anonymous · Answer

is it? radius = 4.30?