Solve.Mark and Rachel both work for Smith Landscaping Company. Mark can finish a planting job in 3 hours, while it takes Rachel 2 hours to finish the same job. If Mark and Rachel will work together on the job, and the cost of labor is $60 per hour, what should the labor estimate be? (Round to the nearest cent, if necessary.)
A. $50.00
B. $72.00
C. $150.00
D. $144.00
Answer: B
Mathematics
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A. 
B. 
C. 
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