Homework Help: Algebra help

Posted by Shawn on Monday, December 1, 2008 at 9:46am.

If loga 8=2.079, loga 5=1.609, and loga 3=1.099, find the following?

19.) loga 8/3 is this 1.89?

20.) loga 24 Not sure

21.) loga 25 not sure how to do this

Algebra help - Reiny, Monday, December 1, 2008 at 9:56am
make use of your main "log rules"

log (8/3) = log 8 - log 3 = 2.079 - 1.099
= 0.98

log 24 = log (3x8) = log 3 + log 8
= ....

log 25 = log 5^2
= 2 log 5
= ...
Algebra help - Shawn, Monday, December 1, 2008 at 10:12am
Okay I got it

log (8/3) = log 8 - log 3 = 2.079 - 1.099
= 0.98

log 24 = log (3x8) = log 3 + log 8
= 3.688

log 25 = log 5^2
= 2 log 5
= 2.138
- Algebra help - Reiny, Monday, December 1, 2008 at 10:13am
  great,
  BTW, how would you find 'a' itself?

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