Chapter 7 Test Redemption: G & D Applications: #6 - 8

Which of the following exponential functions represents an initial value of 1450 and a decay of 18% for x years?

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitoes will there be after 4 months?

• 9766
• 9006
• 9765
• 5433

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x

Your 6 year investment of $40,000 at 14% compounded quarterly is worth how much now?

• $928,488.27

• $49,170.21

• $91,333.14

• $51,333.14

Your $54,200 2 year car loan is at 15.1% compounded annually. What will you have paid for your car after 2 years?

• $62,693.15

• $62,384.20

• $71,804.21

• $341,465.42