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Mathematics 7 Online
OpenStudy (errinss):

help!!! will fan and medal

OpenStudy (errinss):

Vocaloid (vocaloid):

hint: you will need 2 formulas. one for the volume of a sphere, and the other for the volume of a cylinder

Vocaloid (vocaloid):

do you know which ones these are?

OpenStudy (errinss):

\[V=(\pi)R^2*H\] ^Cylinder^

OpenStudy (plainntall):

It looks like you need to subtract the volume of the ball from the volume of the cylinder to get the volume of the foam. Do you have the formula for the volume of a sphere and the volume of a cylinder?

Vocaloid (vocaloid):

good, what about sphere?

Vocaloid (vocaloid):

you can use google if you don't remember

Vocaloid (vocaloid):

almost, just switch the 4 and 3

Vocaloid (vocaloid):

so your answers are B and C

OpenStudy (errinss):

\[V=\frac{ 4 }{3}*\pi*R^2\]

Vocaloid (vocaloid):

r^3 not r^2

Vocaloid (vocaloid):

but otherwise good

OpenStudy (errinss):

ya sorry lol, why would it be B?

Vocaloid (vocaloid):

oh sorry

Vocaloid (vocaloid):

a and c

Vocaloid (vocaloid):

silly me

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