Exponential Functions (Mixed Practice)

$9000 is placed in an account with an annual interest rate of 7.75%. How much will be in the account after 18 years, to the nearest cent?

• $17565.02

• $34494.79

• $9000.00

• $32328.41

A town has a population of 10000 and grows at 2.5% every year. What will be the population after 7 years, to the nearest whole number?

• 9981 people

• 10591 people

• 12437 people

• 11887 people

An element with mass 310 grams decays by 5.7% per minute. How much of the element is remaining after 9 minutes, to the nearest 10th of a gram?

• 182.8 grams

• 235.7 grams

• 191.5 grams

• 112.1 grams

A new car is purchased for $15500. The value of the car depreciates at 7.5% per year. What will the value of the car be, to the nearest cent, after 6 years?

• $8653.97

• $14381.19

• $9709.17

• $10225.36

An investment of $2280 is placed into an interest bearing account with an annual interest rate of 3.375%. The interest is compounded weekly. What is the value of the investment after 30 months?

• $2927.28

• $2480.66

• $2520.75

• $2397.24

In 1989, an investment of $36000 was placed into an interest bearing account with an annual interest rate of 4%. The interest has been compounding daily up until 2023. What is the value of the investment?

• $146,002.74

• $135,879.56

• $137,716.23

• $140,252.51

Owen is going to invest in an account paying an interest rate of 5.7% compounded continuously. How much would Owen need to invest, to the nearest hundred dollars, for the value of the account to reach $122,000 in 14 years?

• $54900

• $55000

• $54927.88

• $54000

Khloe invested $160 in an account paying an interest rate of 5.7% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest ten dollars, would be in the account after 17 years?

• $422

• $421

• $420

• $421.65

Nathaniel invested $2,900 in an account paying an interest rate of 5.4% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest cent, would be in the account after 11 years?

• $5352.52

• $5253.52

• $5252.00

• $5252.53