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20 March, 09:35

At the beginning of an experiment, there are 400 grams of contaminants. Each hour, three-fourths of the contaminants are filtered out.

A. Formulate a recursive sequence modeling the number of grams after "n" hours.

B. Use the model to calculate the amount of contaminants after the third hour of the experiment.

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  1. 20 March, 12:53
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    a (n) = 0.75*a (n-1)

    Ans: 400; (3/4) 400 = 300; (3/4) 300 = 900/4; (3/4) 900/4 = 2700/16 = 168.75g's
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