SOLUTION: if c varies directly as d and d varies directly as e, and when c=4 when e=12,find c when e=3

Question 1105893: if c varies directly as d and d varies directly as e, and when c=4 when e=12,find c when e=3
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
I'll choose the variation constants to be k and r.

Substitute.

We could really use just one single variable for .
Let .

Now .

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when c=4 when e=12,find c when e=3
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Model for the problem description is .

Let e=3.

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