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OpenStudy (anonymous):
Dorothy and Rosanne are baking cookies for a party, working alone Roseanne can finish in 6 hours and Dorothy can finish them in 8 hours. How long will it take if they work together? Round your answer to the nearest hundredth if necessary.... ---> The answer is 3.43, I just want to know how to work the problem out to get that answer. Please and thank you.
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