Brian is creating a collage on a piece of cardboard that has an area of 120r3 square centimeters. The collage is covered entirely by pieces of paper that do not overlap. Each piece has an area of square centimeters. Use the given information to determine an expression for the total number of pieces of paper used.

Question

anonymous · Answer

Area cannot be r3. Is it r2?

anonymous · Answer

What is the area of each square piece?

anonymous · Answer

Here is the area of each piece http://learn.flvs.net/webdav/assessment_images/educator_algebra1_v10/10_00_82.gif

anonymous · Answer

and the area is 120r^3

anonymous · Answer

$$ 120r ^{3}/\sqrt{r ^{5}} = 120\sqrt{r}$$

That's the no of pieces required

anonymous · Answer

So that isnt the answer?

anonymous · Answer

120√r  <--- that's the answer according to the info you gave

anonymous · Answer

Okay thanks so much!

anonymous · Answer

Basically area of the board / area of each piece

anonymous · Answer

you're welcome