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A pine tree measured 40.5 feet tall. Over the next 7.5 years, it grew to a height of 57 feet. during the 7.5 years, what was the average yearly growth rate of the height of the tree?

Guest May 2, 2017
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I learnt this but I forgot how to do it...

ReChan  May 2, 2017
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It grew 16.5 feet during those 7.5 years (57.0 - 40.5 = 16.5).

To find the average yearly growth rate, divide this amount by the number of years:

     16.5 / 7.5  =  2.2 feet per year.

geno3141  May 2, 2017
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I think i know this but i had forgotten it. Sorry crying

Guest May 2, 2017

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