Question

The diameter of a softball is 3.8 inches. Estimate the amount of leather used to cover the softball.

Answer 1

Thinking I use volume of a sphere formula

Answer 2

Almost. To work out the amount of material COVERING an object, you have to use the surface area formula.

Answer 3

Do you know the surface area formula for a sphere?

Answer 4

oh I was thinking volume

Answer 5

\[4\pi(r^2)\]

Answer 6

4pir^2

Answer 7

Do you think you can substitute values into this equation? Of course the r in the equation means radius, which is the diameter given above divided by 2.

Answer 8

how did you type pi on the screen like that?

Answer 9

Just type pi.

Answer 10

He pressed the "Equation" button.

Answer 11

Yes I can do the rest, just wasn't sure about the formula thanks!1

Answer 12

No problem :)

Answer 13

15.12 in - but that seems like a lot of material??

Answer 14

thanks Isaiah - never used it lol

Answer 15

\[4\pi1.9^2=45.36 inches squared. \]

Answer 16

ooops haha but i don't know how you got to your answer.