Using it's concept, it is found that the domain of the function is given as follows:
d. 0 < c ≤ 15
The domain is the set that contains all possible input values for the function.
He is losing weight consistently, hence c > 0, and the maximum amount is of 15 calories, hence c ≤ 15 and the domain is given by:
d. 0 < c ≤ 15
More can be learned about the domain of a function at https://brainly.com/question/24374080
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