Unit 5 Quiz 1 Exponential Growth and Decay

Which of the following graphs models exponential decay?

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The population of a city is growing at the rate of 0.4% per year. In 2007 it was 83,000 people. Which function represents the towns population “t” years after 2007?

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Which of the exponential functions below shows growth ? Select all that apply.

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Which of the exponential functions below shows decay ? Select all that apply.

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The number of employees at a certain company is 1440 and is increasing at a rate of 1.5% per year. Write an exponential growth function to model this situation. Then find the number of employees in the company after 9 years.

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Determine the correct function and amount given the following information: $12,000 invested at a rate of 6% compounded quarterly; 15 years

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Determine the correct function and amount given the following information: $500 invested at a rate of 2.5% compounded annually; 10 years

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• NONE OF THE ABOVE

The deer population of a game preserve is decreasing by 2% per year. The original population was 1850. Write an exponential decay function to model the situation. Then find the population after 4 years.

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The population of Henderson City was 3,381,000 in 1994, and is growing at an annual rate of 1.8%. If this growth rate continues, what will the approximate population of Henderson City be in year 2000?

• 3,696,000

• 3,763,000

• 3,798,000

• 3,831,000

Daniel's Print Shop purchased a new printer for $35,000. Each year it depreciates (loses value) at a rate of 5%. What will its approximate value be at end of the fourth year?

• $33,250.00

• $30,008.13

• $28,507.72

• $27,082.33