Real Life Exponential Functions

1.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.

• 488441
• 18195.84
• 855356
• 6518800

2.The population of a town is 2500 and is decreasing at a rate of 3.5% per year. Use an exponential
function to find the population of the town after 5 years.

• 2969
• 46132
• 244141
• 2092

3.Daniel’s Print Shop purchased a new printer for $35,000. Each year it depreciates at a rate of 5%.

Use an exponential function to find its approximate value after 8 years.

• 23219.7

• 51710.9

• 136.72

• 897012

4.The population of a school is 800 students and is increasing at a rate of 2% per year. Use an
exponential function to find the population of the school after 9 years.

• 956
• 667
• 107.4
• 4127.82

5.Kathy plans to purchase a car that depreciates at a rate of 12% per year. The initial value of the car

is $21,000. Use an exponential function to find the value of the car after 3 years.

• 20253

• 14310.9

• 271765

6.During a certain period of time, about 70 northern sea otters had an annual growth of 18%. Use an
exponential function to find the number of sea otters after 4 years.

• 31.7
• 65.09
• 135.7
• 75.17

7.A population of fish starts at 8,000 and decreases by 6% per year. Use an exponential function to find
the population of fish in 10 years.

• 14326.8
• 879609
• 0.8388
• 4308.92

Tags

CCSS.HSF-LE.A.1C

8.Twenty years ago, Mr. Davis purchased his home for $160,000. Since then, the value of the home has
increased about 5% per year. Use an exponential function to find the value of the home today

• 57357.7
• 152588
• 535041
• 424528

9 . A population of a city is 422,000 and increases by 12% each year. Use an exponential function to
find the population of the city after 8 years.

• 151766
• 104860
• 1044860
• 383149

Tags

CCSS.HSF-LE.A.1C

10. Caiden earned $475 from mowing laws 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 years?

• 59549.7
• 831.1
• 265.65
• 1034.6