Question

If a tennis ball has a diameter of approximately 6.5 centimeters, what is its surface area?

132.73 square centimeters

265.46 square centimeters

530.93 square centimeters

862.76 square centimeters

Answer 1

do you know the SA formula for a sphere?

Answer 2

no i dont

Answer 3

\[4\pi r ^{2}\]

Answer 4

right, so now find the radius given the diameter and plug it into the formula :)

Answer 5

omg, how do you find the radius now?

Answer 6

divide the diameter by 2

Answer 7

the radius is half the diameter

Answer 8

so your formula should be like this: 4π(3.25)^2

Answer 9

now just plug that into a calculator and ur all set ;)

Answer 10

ok imma try

Answer 11

Do you get it now?

Answer 12

did you get an answer yet?

Answer 13

yea i got A

Answer 14

cool :D

Answer 15

I know, thanks alot :)

Answer 16

no problem :)