SOLUTION: The weight of a tree is doubling every 3 years. In how many years will the weight of the tree be 1600% of its wieght now?

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Question 552355: The weight of a tree is doubling every 3 years. In how many years will the weight of the tree be 1600% of its wieght now?
Answer by Alan3354(69443) About Me  (Show Source):
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The weight of a tree is doubling every 3 years. In how many years will the weight of the tree be 1600% of its wieght now?
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1600% is 16 times its present weight.
16 = 2^4, so that's four periods.
4*3 = 12 years