Emily burns 250 calories per hour biking. This can be represented with the function c(h) = 250h, where h is the number of hours spent biking. Her mother asked her to tow her little sister in the bike trailer, which causes her to burn three times as many calories. This can be represented by the function t(c) = 3c, where c is the number of calories burned per hour. Write a function that will help Emily calculate the number of calories she will burn per hour while biking with her sister in the bike trailer.

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