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A gardener is planting two types of tree...

A gardener is planting two types of trees. One type is seven feet tall and grows at a rate of 8 inches per year. The other type is four feet tall and its rate of the growth is 50% greater than the rate of the other tree. In how many years will the two grow to the same height?

A

`6`

B

`7`

C

`8`

D

`9`

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The correct Answer is:
D
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