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Chemistry

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2. 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?

A.)720 pounds

B.)360 pounds

C.)1,440 pounds

D.)114 pounds

I think the answer is D.
Please help.
Thank You.

  • Chemistry - ,

    How on earth did you get 114 lbs.???

    At the end of 4 hours >> 90 * 2 = 180 lbs.

    At the end of 8 hours >> 180 * 2 = 360 lbs.

    At the end of 12 hours >> 360 * 2 = 720 lbs.

  • Chemistry - ,

    Thank you - just misread the question...

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