1. 8-6 Compound Interest and Exponential Growth

2. Exponential Growth
An exponential model is y=C(a)x, if a>1 the change is exponential growth. If a<1 it is exponential decay.
Compound Interest is an example of an exponential growth model. An initial amount, C, is multiplied by a growth factor (1+r) each time period. At each stage, the amount increases by r percent (decimal form).

3. Compound Interest A=P(1+r)t P is the principal
r is the rate as a decimal
t is time in years

4. Suppose $700 is deposited in an account that pays 7
Suppose $700 is deposited in an account that pays 7.5% annual interest compounded yearly. What is the balance after 8 years?

5. How much is deposited in an account that pays 5% interest compounded yearly to have a balance of $ after 10 years?

6. Assignment