Which dog sitting service is more economical to use if you need 5 hours of service?Explain.derricks dog sitting 12 plus 5 per hour and darlenes dog sitting 18 plus 3 per hour
The two services cost the same at 3 hours. Anything over that, and Darlene's service is cheaper, because she chargers less per hour.
Derrick: 12 + 5(5) = 37
Darlene: 18 + 3(5) = 33
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