Question

A machine coats metal spheres with a plastic coating. The metal spheres have a radius of 9 mm. The spheres formed by the metal and plastic coating have a radius of 12 mm.

How much plastic coating is on each sphere?
Use 3.14 to approximate pi and express your final answer in hundredths.

___mm3

Answer 1

@StudyShark2000

Answer 2

Big sphere w/ plastic n metal
Small sphere w/ metal only

u need to find volume of plastic in between so...

Answer 3

How?

Answer 4

the plastic is in between the spheres right?

Answer 5

Yes...

Answer 6

can u calculate the volumes of the 2 spheres?

Answer 7

Hold on lemme try

Answer 8

Ok for the first radius(12) I got 7234.56
For the second radius(9) I got 3052.08

Answer 9

n the volume of the plastic used?

Answer 10

So do I add them together?

Answer 11

Add??

Answer 12

look at my drawing again plz?

Answer 13

7234.56 & 3052.08

Answer 14

plastic is in between the two spheres

Answer 15

Im confused....

Answer 16

How would I find the answer?

Answer 17

take a deep breath, relax, close ur eyes for 1 min, then look at the drawing n what we have done so far.

if u cant figure it out after that, come back n i will tell u okay?

Answer 18

Ok I cant figure it out :'/