The meaning of the composite function c(p(45)) is the number of calories burned doing push-ups in 45 seconds
The functions are given as:
So, the interpretation of the function c(p(t)) is
The number of calories burned doing push-ups in t seconds
In c(p(45)), the value of t is 45
Hence, the meaning of the composite function c(p(45)) is the number of calories burned doing push-ups in 45 seconds
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