1. Bell ringer
The Johnson’s started a savings account for their son. They invested $5,000 in an account with a 7.5% interest rate that compounds quarterly.
How much will they have in the account after 20 years?
How much interest will they have earned?

2. Logarithms
Tuesday, February 13, 2018

3. Graphs
Exponential
Logarithmic

4. Inverse

5. Notes
The inverse of an exponential function is a common logarithmic function.
Convert from exp. to log  bx = y  logb y = x
Convert from log to exp.  logb y = x  bx = y

6. convert

7. NOTES
Calculators only do log10 aka “common log”, so log is really log base 10.
Change of Base  logba = log a
logb
logb1 = 0
Can’t take  log 0 or log of a negative #
Can’t do  log base 0, or 1, or negative #

8. Change that base

9. practice Change Base & Convert Classwork
Change Base & Convert Homework

10. Exit Ticket 1. How do you “convert”? 2. How do you “Change Base”?
3. What is the base if it doesn’t say?