<u>I believe this is right. Someone feel free to verify my work/methods. </u>
Answer:
W = 0.01315 cm
Explanation:
So, thickness is another way to say "width". You can calculate this by finding the volume of the rectangular object.
Let us take a look at the density formula:
<em>Density = mass/volume </em>
We have the mass AND the density, but not the volume.
1.3 g/cm^3= 11.4 g/ v
Solve for the "v" (volume).
You should get:
v = mass/density
v = 11.4 g/ 1.3 g/cm^3
v = 8.769 cm^3
Now, let us recall the formula for volume.
<em>v = length x width x height</em>
We have two of these.
8.769 cm^3 = 54.2 cm x 12.3 cm x (W)
8.769 cm^3 = 666.66 cm^2 x W
W = 8.769 cm^3 / 666.66 cm^2
W = 0.01315 cm
