1. Objectives:
1. Solve exponential equations

2. are
equations with a variable in the
exponent.
In 5-2 we solved some like this:
But,
what if both sides can’t be
written with the same base?
Need to use a log!

3. Solve:



4. Solve:



5. In
1990, there were about 5.4
billion people in the world. If the
population has been growing at
1.95% per year, estimate when the
population will be 8 billion people.

6. The
half-life of carbon-11 is 20
minutes. How long will it take 800
g of carbon to decay to:
640 g?
40
g?

7. You
invest P dollars at an annual
rate of 6% compounded daily.
How long does it take to:
Increase your investment by 50%?
Double
your money?

8. An
investment is made at 7%
annual interest compounded daily.
How long does it take to triple the
investment?