SOLUTION: Write an equation that can be used to solve the problem. Solve the equation and answer the question. Naomi Ericson and Ricky Mendoza work for a computer software company. Together

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Question 549906: Write an equation that can be used to solve the problem. Solve the equation and answer the question. Naomi Ericson and Ricky Mendoza work for a computer software company. Together they can write a particular computer program in 17 hours. Naomi can write the program by herself in 13.04 hours. How long will it take Ricky to write the program alone?
I have no idea how to do this one.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Naomi Ericson and Ricky Mendoza work for a computer software company. Together they can write a particular computer program in 17 hours. Naomi can write the program by herself in 13.04 hours. How long will it take Ricky to write the program alone?
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Comment:
If Naomi can do it in 13.04 hours alone why do they require
15 hrs to do it when they both work at it?
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Cheers,
Stan H.