Algebra 2

How would I make up a problem that could be represented by the equation:
h(x)=42(1/2)^x ?
I would really apprecitate some help, thank you!

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  1. That would be the answer for a radioactivy problem in which the initial radioactivity level is 42 (Curies or whatever units you choose) and the number of half lives gone by is x.

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