The wettest april for albuquerque, nm, was recorded in 1905. the amount was 1.2in more than the amount recorded for the second wettest april, in 2004. if the total rainfall for these two months was 7.2in, how much rain fell in april of each year?

This is a perfect example of exponential decay. In this case the growth factor should be represented by a fraction, and it is! This forest, starting out with apparently ( 800? ) pine trees, has a disease spreading, which kills 1 / 4th of each of the pine trees yearly. Therefore, the pine trees remaining should be 3 / 4.

Respectively 3 / 4 should be the growth factor, starting with 800 pine trees - the start value. This can be represented as such,

- where a = start value, b = growth factor, t = time ( variable quantity )

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Thus, the function can model this problem. The forest after t years should have P( t ) number of pine trees remaining.