Mark M. answered • 08/23/16
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Mathematics Teacher - NCLB Highly Qualified
rate = (274 - 190) / 3
rate = 84 / 3
rate = 28
The tree 28 cm per year.
(344 - 274) / 3
70 / 3
2 1/3
It took 2 and 1/3 year to grow to 344 cm.
Mark M.
Trolling?
And 5.5 is supported by what work?
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08/06/17
Carlos T.
No hes actually right
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03/23/18
Andrea L.
kinda late but yeah on khan academy if you put 5.5 its right
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08/07/18
Advit M.
yeah
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02/14/19
B. D.
I just checked . . . neither of them worked
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03/22/19
Jessica L.
The first answer is 28cm a year. The second is 5.5 years. The reasoning.: In the first problem we take the trees current height, 274 cm and subtract the initial height 190 cm. We get 84cm of growth over 3 years. 274-190=84. We get the rate by dividing 84 by 3. 84÷3=28. So the tree grew at a constant rate of 28cm per year. Now for the second part we take 344 cm and subtract the initial height of the tree, which was 190 cm, this gives us 154 cm. We then take that and divide by the now known rate of 28 cm per year. 154 ÷28=5.5. So for the tree to grow to 344 cm at a constant rate of of 28 cm it would take 5.5 years.
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11/13/20
John L.
08/05/17