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# Exponential Population Growth

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The population P of a city is given by P = 2000e^kt . Let t=0 correspond to the year 1960 and suppose the population in 1950 was 1500. Find the value of k ( to 3 decimal places) and then predict the population in 2000.

Please show all steps & graph, solve using derivatives or ln on calc.

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This provides an example of solving a word problem with exponential population growth.

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The population P of a city is given by P = 2000e^kt . Let t=0 correspond to the year 1960 and suppose the population in 1950 was 1500. Find the value of k ( to 3 decimal places) and then predict the ...

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###### Education
• BSc , Wuhan Univ. China
• MA, Shandong Univ.
###### Recent Feedback
• "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
• "excellent work"
• "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
• "Thank you"
• "Thank you very much for your valuable time and assistance!"

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