Homework Help: Chemistry

Posted by Deborah on Thursday, January 24, 2013 at 10:18pm.

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.

Math - Deborah, Thursday, January 24, 2013 at 10:19pm
.
Chemistry - Ms. Sue, Thursday, January 24, 2013 at 10:38pm
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 - Deborah, Friday, January 25, 2013 at 6:22pm
Thank you - just misread the question...

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