Exponential Growth/Decay & Compound Interest

In the compound interest formula A=P(1+r)^t what does the A stand for?

• The amount of interest

• The total amount

• The interest rate

• The time

In the compound interest formula A=P(1+r)^t what does the P stand for?

• The time

• The total amount

• The principal amount (original amount)

• The interest rate

Find the balance in the account after the given period.

$5000 deposit earning 1.5% compounded quarterly after 3 years

• $5,229.70

• $7,604.38

• $7,777.27

• $5,538.86

Find the balance in the account after the given period.

$13,500 deposit earning 3.3% compounded monthly after 1 year

• $13,611.38

• $14,898.84

• $13,537.13

• $13, 952.30

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

An investment of $9,875 earns 4.8% interest compounded monthly over 12 years. Approximately how much INTEREST is earned on the investment?

• $7,457.95

• $10,359.57

• $17,546.55

• $484.57

Will deposits $1650 for three years at 3% interest, compounded daily. What is his ending balance?

• $1,700.25

• $4,056.85

• $2,103.87

• $1,805.38

The population of a town is decreasing at a rate of 5% per year. This year there are 10,000 people in this town, how many people will be left in 20 years from now? (round to the nearest whole number)

• 26,533 people

• 358 people

• 1 person

• 3,585 people

You have inherited land that was purchased for $30,000. The value of the land increased by approximately 5% per year. What is the approximate value of the land 51 years later?

• $344,022

• $31,500

• $15,000

• $28,500

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