1. [SOLVED] Conversion help!

calculate the area of your watch glass in cm^2, then convert to in^2.
Area = (pie)r^2

So the diameter of the watch glass was 10.10cm. Therefore, the radius is 5.05cm.. how do i conver 5.05 cm to cm^2????? can i just tag on a ^2 or is their another way to do this??

2. Originally Posted by Legendsn3verdie
calculate the area of your watch glass in cm^2, then convert to in^2.
Area = (pie)r^2

So the diameter of the watch glass was 10.10cm. Therefore, the radius is 5.05cm.. how do i conver 5.05 cm to cm^2????? can i just tag on a ^2 or is their another way to do this??
Since $\displaystyle r=5.05~cm$, then the area would be $\displaystyle A=\pi\left(5.05~cm\right)^2\approx 80.12~cm^2$

Now to convert to inches, we see that $\displaystyle \frac{1~in}{2.54~cm}\implies \frac{1~in^2}{6.4516~cm^2}$

So then $\displaystyle A=80.12~cm^2\times\frac{1~in^2}{6.4516~cm^2}\appro x\dots$

Does this make sense? Can you finish this off?

--Chris

3. Originally Posted by Chris L T521
Since $\displaystyle r=5.05~cm$, then the area would be $\displaystyle A=\pi\left(5.05~cm\right)^2\approx 80.12~cm^2$

Now to convert to inches, we see that $\displaystyle \frac{1~in}{2.54~cm}\implies \frac{1~in^2}{6.4516~cm^2}$

So then $\displaystyle A=80.12~cm^2\times\frac{1~in^2}{6.4516~cm^2}\appro x\dots$

Does this make sense? Can you finish this off?

--Chris
hm so u got 80 for a answer? thats about what i was getting wasnt sure if it was right.

4. actually answer is 12.4 right?

5. Originally Posted by Legendsn3verdie

Keep in mind though, that the units are $\displaystyle in^2$.

--Chris

6. Originally Posted by Chris L T521

Keep in mind though, that the units are $\displaystyle in^2$.

--Chris
aite thansk that deffintly helped big time for sure! ty.