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October 31, 2014

Homework Help: Math

Posted by Gregory on Sunday, February 19, 2012 at 11:06pm.

Need help understanding half-life/decay problem for upcoming test.

A water filter is constructed to form a foam that removes 25% of the particulate impurities for each inch of foam.

1.What percentage of the particulate impurities will be removed by a filter consisting of two inches of?
2. How many inches of foam are needed for the filter to remove 50% of the particulate impurities.

Can you explain in either the A=Pa^x or A=Pe^-rx form?

I just mainly need help on setting up the problem.

Thank You Very Much.

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