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AP Calculus Slides April 18, 2007
1. The bacteria in a certain culture increase continuously at a rate
proportional to the number present.
(a) If the number triples in 6 hours how many are there in 12 hours?
(b) In how many hours will the original amount quadruple?
2.
3.
4. Radium decomposes at a rate proportional to the amount present. Find
an expression for the amount R left after t years, if R is present
0
initially and c is the negative constant of proportionality.