Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much algae will be in the pond after 12 hours?

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asked Sep 27, 2018 140k views

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Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much algae will be in the pond after 12 hours?

Mathematics
high-school

Chris Hinton asked

by Chris Hinton

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2 Answers

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Answer: 720 pounds of algae

Explanation:

Shingaridavesh answered Sep 30, 2018

by Shingaridavesh

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4 votes

If it doubles every 4 hours, in 12 hours you will have 3 doublings.
2 * 2 * 2 = 8
90*8 = 720 pounds of algae

Daniel Cook answered Oct 4, 2018

by Daniel Cook

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