Aldo is choosing between two exercise routines.

Aldo is choosing between two exercise routines.

In Routine #1, he does only running, burning 8.5 calories per minute.

In Routine #2, he burns 21 calories walking. He then runs at a rate that burns 4.3 calories per minute.

For what amounts of time spent running will Routine #1 burn more calories than Routine #2?

Use t for the number of minutes spent running, and solve your inequality for t .

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