Question

When Derek planted a tree it was 36 inches tall. The tree grew 1 1/4 inches per year. The tree is now 44 3/4 inches tall. How many years ago did Derek plant the tree?

Answer 1

Original Height = 36 inches.

Change in height:


`44(3)/(4) - 36 = 8(3)/(4)`

Number of years :


`8(3)/(4) / 1(1)/(4)`


`=(35)/(4) / (5)/(4)`


`=(35)/(4) * (4)/(5)`


`=7`

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Answer; Derek has planted the tree for 7 years.
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