Help with radical expression!!!

**cecij22** · September 9th 2008, 01:12 PM

I need help with this problem:

(sqroot 5)*(sqroot .0025)/(sqroot .0009)

**Matt Westwood** · September 9th 2008, 01:15 PM

$\frac {\sqrt 5 \sqrt{.0025}}{\sqrt {.0009}}$

$= \sqrt {\frac {5 \times .0025}{.0009}}$

$= \sqrt {\frac {5 \times 25}{9}}$

$= \sqrt 5 {\frac {5}{3}}$

... I think.

**Shyam** · September 9th 2008, 01:17 PM

Originally Posted by cecij22

I need help with this problem:

(sqroot 5)*(sqroot .0025)/(sqroot .0009)

$=\frac{\sqrt{5}\times \sqrt{0.0025}}{\sqrt{0.0009}}$

$=\frac{\sqrt{5}\times 0.05}{0.03}$

$=\frac{\sqrt{5}\times 5}{3}$

$=\frac{5\sqrt{5}}{3}$

**cecij22** · September 9th 2008, 02:15 PM

Wouldn't the $\sqrt{5}$ also get multiplied by 100 when you multiply to get rid of the decimal points?

**11rdc11** · September 9th 2008, 02:19 PM

yes

**Matt Westwood** · September 9th 2008, 02:28 PM

No

$\frac {\sqrt 5 \times 0.05}{0.03} = \frac {\sqrt 5 \times 5 \times 0.01}{3 \times 0.01}$

You only got one 0.01 on top and bottom to cancel with each other.

**11rdc11** · September 9th 2008, 02:33 PM

oops thanks for pointing that out

**cecij22** · September 10th 2008, 06:31 AM

Ohhhh...I get it. Thank you everyone for all your help.

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