In a certain culture of bacteria, the rate of increase is proportional to the number present. (a) If it is found that the number doubles in 6 hrs, how many may be expected at the end of 18 hrs? (b) If there are 102 at the end of 4 hrs, and 8 ∙ 102 at the end of 8 hrs, how many were there in the beginning?

Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter53: Introduction To Ecology: Population Ecology
Section53.2: Changes In Population Size
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In a certain culture of bacteria, the rate of increase is proportional to the number present. (a) If it is found that the number doubles in 6 hrs, how many may be expected at the end of 18 hrs? (b) If there are 102 at the end of 4 hrs, and 8 ∙ 102 at the end of 8 hrs, how many were there in the beginning?

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