First of all, be
sure you have written or draw the triangle from the last page.
If you haven't done so, <click
here to go get it> Now we are ready to continue. 


If you want to go
directly to a certain problem, click on the link below: 
Sample
Problems: 
Solving
for density 



Solving
for volume 

Solving
for mass 




Problem
number one (solving for density):
A piece of wood has a mass of 35 grams. If its volume is 7 cm^{3},
What is its density?
In order to solve this we have to do some different steps.
First we write the formula as we intend to use it. Second, we place
the numbers into the formula where they go (called the setup) and lastly
we do the mathematical calculations to attain the answer. 
Step One: 
Write the formula as we need to use
it. In this question, they are asking for Density.
So we are going to write the formula solving for that. 
Formula:
D = m / v 
Step Two: 
Now we have to figure out what value
goes for each letter: the M and the V. In this problem, it
tells us the mass is 35g and the volume is 7 cm^{3}. So put them
in the formula. 
D =
35g / 7cm^{3} 
Step Three: 
Now the last and easiest part, do
the math. Be sure you keep your units with your problem. For
example, in this one, its units will be g/cm^{3 } since that is what we did mathematically. 
5
g/cm^{3} 
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Problem
number two (solving for volume):
The density of a substance is 7.8 g/cm^{3}. What volume does 39
grams of it take up?
In order to solve this we have to do some different steps.
First we write the formula as we intend to use it. Second, we place
the numbers into the formula where they go (called the setup) and lastly
we do the mathematical calculations to attain the answer. 
Step One: 
Write the formula as we need to use
it. In this question, they are asking for Volume.
So, using the triangle, we are going to write the formula solving for
that. Cover up the V and write the function the other two variables
will be doing. 
Formula:
v =
m / D 
Step Two: 
Now we have to figure out what value
goes for each letter: the D and the m. In this problem, it
tells us the mass is 39g and the density is 7.8 g/cm^{3}. So put
them in the formula. 
V = 39g /
7.8g/cm^{3} 
Step Three: 
Now the last and easiest part, do
the math. Be sure you keep your units with your problem. For
example, in this one, its units will be cm3 since when we divide the g by
g/cm^{3}, the grams cancel and leave just the cm^{3} 
5 cm^{3} 
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Problem
number three (solving for mass):
The density of water is 1 g/ml. What mass does 30 ml of water
have?
In order to solve this we have to do some different steps.
First we write the formula as we intend to use it. Second, we place
the numbers into the formula where they go (called the setup) and lastly
we do the mathematical calculations to attain the answer. 
Step One: 
Write the formula as we need to use
it. In this question, they are asking for Mass
So, using the triangle, we are going to write the formula solving for
that. Cover up the m and write the function the other two
variables will be doing. 
Formula: m
= D x v 
Step Two: 
Now we have to figure out what value
goes for each letter: the D and the v. In this problem, it
tells us the volume is 30ml and the density is 1 g/ml So put
them in the formula. 
m = 1 g/ml x 30
ml 
Step Three: 
Now the last and easiest part, do
the math. Be sure you keep your units with your problem. For
example, in this one, its units will be g since when we multiple the g/ml
by g, the ml cancel and leave just the g 
30 g 
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