Turn in your Quiz!!!Complete the following:

Section 11-5: Common Logarithms

The questions are… What is a common log? How do I evaluate common logs? What is an antilog? How do I evaluate logs in bases other

than 10 and e? So what are these logs good for and

how do I use them?

What is a common log?

How do I evaluate common logs?

3log5 2

219log

6

What is an antilog? Just another name for an

exponential function with a base of 10.

0.0600

2.3

antilog 0.0600 10

antilog 2.3 10

How do I evaluate logs in bases other than 10 and e?

3log 27

3log 13

Change of base formula

loglog

loga

nn

a

Try this…

0.5log 0.0675

So what are these logs good for and how do I use them?

45 73x

Let’s try some from p 731

Solving by graphing29 2 8x x

Homework:

P 730 #19 – 51 odd, 52, 53, 57, 61 and 63

TEST!!! Friday