### Home > A2C > Chapter 7 > Lesson 7.3.3 > Problem7-189

7-189.
1. Given that log 2 ≈ 0.3010, log 3 ≈ 0.4771 and log 5 ≈ 0.6990, calculate each of the following logarithms without using a calculator. Homework Help ✎

1. log 6

2. log 15

3. log 9

4. log 50

log 6 = log (2 · 3)
Now use the properties of logs to expand.

log 2 + log 3 ≈ 0.7781