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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? A 7   B 8   C 9   D 10
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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? A 7   B 8   C 9   D 10

User Corentin
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1 Answer

3 votes
36 inches = 1st year
44.75 inches - 36 inches = 8.75 inches
Meaning it grew 8.75 inches

Since it grew 1.25 inches per year,

8.75 / 1.25 = 7
Derek planted the tree 7 years ago.
The answer is A.

Hope this helps.
User Caleb
by
8.4k points
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