5.2 Exponential Growth and Decay Word Problems

Front

Middletown High School has student elections every year. Lately, the school has seen a 5% decrease in voting from election to election. If 910 students voted this year, how many will be expected to vote 8 years from now?

Back

604

Front

If there are 6,200 farmers' markets this year and the number increases by 15% each year, how many will there be in 10 years?

Back

25,082

Front

A magazine with 98,000 subscribers is predicted to lose 10% of its subscribers each year. How many subscribers will it have in 10 years?

Back

34,170

Front

Jenny has $20 in a savings account. The interest rate is 5%, compounded annually. How much interest will she earn in 2 years?

Back

$2.05

Front

Lauren has $90 in a savings account. The interest rate is 5%, compounded annually. How much will she have in 2 years?

Back

$99.23

Front

A cliff overlooking Oak Grove Lake is experiencing erosion, losing elevation at a rate of 5% every millennium. The cliff's current elevation is 1,200 meters. What will its elevation be in 6 millennia?

Back

882

Front

Kelsey deposited $30 in a savings account earning 10% interest, compounded annually. How much interest will she earn in 3 years?

Back

$9.93

Front

Silvergrove's CO2 emissions reduction: 290,000 metric tons this year, reduced by 5% annually. How much CO2 in 7 years?

Back

202,518

Front

The mice population is 25,000 and is decreasing by 20% each year. What will be the mice population after 3 years?

Back

12,800

Front

Your new computer cost $1500 but it depreciates in value by about 18% each year. How much will your computer be worth in 6 years? (Round to the nearest cent.)

Back

$456.01