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April 18, 2015

April 18, 2015

Posted by **Renee** on Sunday, October 26, 2008 at 12:24am.

- Radical and Rational exponents -
**Reiny**, Sunday, October 26, 2008 at 8:50amYou have just asked two different questions in the same paragraph.

I will do the last one,

then you follow my method to do the first one.

your time for lawn is 1 hour

sister's time to do the same lawn is 2 hours

your combined rate would be lawn/1 + lawn/2 = 3/2 lawn/hour

so time working together = lawn/[lawn/(3/2)]

= 2/3 hours , (lawn will cancel)

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