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Word Problem Exercises: Solving Exponential Growth and Decay Questions Using Logarithms


General Questions


The population in the town of Huntersville is presently 38,300. The town grows at an annual rate of 1.2%. Find the number of years it takes for the population to grow to 42,500.
1. 





The population in the town of Deersburgh is presently 42,500. The town has been growing at a steady rate of 2.7%. Find the number of years ago that the population was 30,000.
2. 





$1,200 is invested at an annual rate of 3.2%. Find the number of years it will take for the account balance to be $1,480.
3. 





The value of a stock when purchased was $10 a share. The stock grew at a monthly rate of 7%. Find the number of months it took to reach a value of $15.75 a share.
4. 





The value of a stock when purchased is $10 a share. The stock decreased at a rate of 3% daily. Find the number of days it took for the stock to be worth $7.40.
5. 








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