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Mathematics, 02.09.2019 19:30 borgesalfonso12

Your classmate is starting a new fitness program. he is planning to ride his bicycle 60 minutes every day. he
burns 7 calories per minute bicycling at 11 mph and 11.75 calories per minute bicycling at 15 mph. how long
should he bicycle at each speed to burn 600 calories per hour?

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