Posted by shannon on .
Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After hours of burning, a candle has a height of centimeters. After hours of burning, its height is centimeters. What is the height of the candle after hours?

math 
Steve,
If the two heights are h1, and h2 after n hours, the height is
h(t) = h1  (h1h2)/n t
Just plug in all those missing numbers that were not in your post.
The burn rate is the height difference divided by how long it took to burn away.