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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?

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?
asked 140k views
4 votes
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?

asked
User Chris Hinton
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8.0k points

2 Answers

6 votes

Answer: 720 pounds of algae

Explanation:

answered
User Shingaridavesh
by
8.1k points
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

answered
User Daniel Cook
by
7.7k points
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