WorksheetsExponential Growth/Decay and Compound Interest Word Problems
Total questions: 21
Worksheet time: 5hrs 15mins
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? (Round to the nearest whole number if necessary).
604
777
29
198
More and more people are purchasing food from farmers' markets. As a consequence, a market researcher predicts that the number of farmers' markets will increase by 15% each year. If there are 6,200 farmers' markets this year, how many will there be in 10 years? (Round to the nearest whole number if necessary).
25,082
12,937
62,000
43,511
A publishing industry report predicts that magazine subscriptions will drop by 10% each year. If this prediction is correct, then how many subscribers will a magazine with 98,000 subscribers have in 10 years? (Round to the nearest whole number if necessary).
34,170
16,348
7690
76,023
Lauren has $90 in a savings account. The interest rate is 5%, compounded annually. To the nearest cent, how much will she have in 2 years?
$99.23
$21.98
$56.46
$9.21
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? (Round to the nearest whole number if necessary).
882
465
349
975
Thanks to its environmental initiatives, Silvergrove has cut its annual CO2 emissions by 5%. This year, the town produced 290,000 metric tons of emissions. If the downward trend continues, how much CO2 will be produced 7 years from now? (Round to the nearest whole number if necessary).
202,518
135,792
78,376
20,658
The mice population is 25,000 and is decreasing by 20% each year. What will be the mice population after 3 years?
12,800
15,777
102, 475
2,500
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.)
$456.01
$556.98
$778.22
$332.63
P = 8(1.23)x
Is the function growth or decay?
Check the box:
Growth
Decay
Q = 3.1(0.78)x
Is the function growth or decay?
Check the box:
Growth
Decay
Annual sales for a fast food restaurant are $650,000 and are increasing at a rate of 4% per year. Use an exponential function to find the annual sales after 7 years.
Round to two decimal places (like dollars and cents).
(a)
The population of the United States has been increasing at an average rate of 0.91%. If the population was about 303,146,000 in 2008, predict the population in 2020.
337,957,677 people
438,124,677 people
862,082,540 people
363,359,037 people
Nathan bought a VERY fancy boat for about $125,000. If the boat's value depreciates at the rate of 15% per year, what is the value of the boat at the end of 10 years?
$12,512.50
$18,750
$24,609.30
$505,694.72
Gasoline costs $1.99 per gallon. If the price per gallon increases an average of 6% per month, which function models the exponential growth of the pricing?
1.06(1.99)t
1.99(1.06)t
[1.06(1.99)]t
1.99(.94)t
Jay'den earned $475 from mowing lawns last summer. He deposited this money in an account that pays an interest rate of 3.8% compounded annually. What will be his balance after 15 year?
Courtney saved up $2,200 working as a waitress over the summer. She put this money into a bank account that earned 5.2% interest and is compounded daily. How much will she have in her account at the end of 4 years?
Which investment would have a larger balance after 5 years?
Option 1 - 4% compounded monthly
Option 2 - 3.9% compounded daily.
