The amount A.t/ of atmospheric pollutants in a certain mountain valley grows naturally
Chapter 3, Problem 50(choose chapter or problem)
The amount A.t/ of atmospheric pollutants in a certain mountain valley grows naturally and is tripling every 7.5 years. (a) If the initial amount is 10 pu (pollutant units), write a formula forA.t/ giving the amount (in pu) present after t years. (b) What will be the amount (in pu) of pollutants present in the valley atmosphere after 5 years? (c) If it will be dangerous to stay in the valley when the amount of pollutants reaches 100 pu, how long will this take?
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