Solution Found!
Answer: Radioactive Decay The half-life of a certain
Chapter 3, Problem 3.1.1.126(choose chapter or problem)
QUESTION:
Exponential Growth The population of River City in the year 1910 was 4200. Assume the population increased at a rate of 2.25% per year.
(a) Estimate the population in 1930 and 1945.
(b) Predict when the population reached 20,000.
Questions & Answers
QUESTION:
Exponential Growth The population of River City in the year 1910 was 4200. Assume the population increased at a rate of 2.25% per year.
(a) Estimate the population in 1930 and 1945.
(b) Predict when the population reached 20,000.
ANSWER:Step 1 of 3
a)
We use the model formula
where is the initial population and is the rate of growth.
Let represent the number of years since 1910.
Here, and . Hence our equation is