5. The population of a certain country is known to increase at a rate proportional fo the number of people presently living in the country. If after two years the population has doubled, and after three years the population is 20,000, find the number of people initially living in the country. 6. 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 x 102 at the end of 8 hrs, how many were there in the beginning? Brino

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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5. The population of a certain country is known to increase at a rate proportional to the
number of people presently living in the country. If after two years the population has
doubled, and after three years the population is 20,000, find the number of people
initially living in the country.
6. 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 x 102 at the end of
8 hrs, how many were there in the beginning?
calt Prino
Transcribed Image Text:5. The population of a certain country is known to increase at a rate proportional to the number of people presently living in the country. If after two years the population has doubled, and after three years the population is 20,000, find the number of people initially living in the country. 6. 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 x 102 at the end of 8 hrs, how many were there in the beginning? calt Prino
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