
Alan G. answered 06/17/16
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Amy,
Without any helpful data to find these functions, how do you expect any tutor to answer your question?
All I could tell you is this (and it is obvious): Ar(d) + An(d) = 24 for any value of d. Once you have more information about one of the functions, you can deduce information about the other, as it will be 24 minus the value of the first.
I could do a little internet research on this, but that should be done by you.
Let me know if you need more assistance with this.