It takes Nate four hours to paint a wall, and it takes Jill seven hours to paint the same wall. About how many hours will it wil l take if Nate and Jill work together to paint the wall?
2 answers:
<span>Rate=1/time<span>
2.5 hours if my math is correct!
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i hope this helps :)
1.56%<span> 1/8 of the original source (25 counts) remains at 3:00pm. This means that the </span>half-life<span> is 1 hour. Continue to find the fraction at 6:00pm.</span>
For the first number you can choose from 8, for the second number only 7, for the third number only 6. So the number of combinations is 8x7x6=336
