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From: RG (206.53.87.216)
Subject:         Need math help- with a problem
Date: January 28, 2013 at 11:22 am PST

Hoping you can give input. Need math help

I need you to show work and explain. Here is what we have:

A gold coin has a mass of 9.25 grams. What is its volume if
the density of gold is 19300 kg/m3?

v= m/d

v= m 9.25 g/d 19300kg/m3

Not sure how and what to do....please help

A helium filled balloon has a volume of 4.5 m3. What mass of
helium does it hold if the density of helium is 1.8x 10-4
g/cm3?

v=4.5 m3
d=1.8x10-4g/cm3
m=dxv

m= 1.8x10-4g/cm3x4.5m3

100cm/1m
m3/m=m2

100cm/1mx100cm/1mx100cm/1m

1000000

m=1.8x10-4 gx4.5 x100x100x100

1.8 x100x100x100

1.000008
180 x 4.5= 810
m=810

please e-mail me


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