• March 25th 2013, 10:16 PM
mathkid182
Given ln 5 1.6

use the log laws to approximate ln 25

any help would be great!
• March 25th 2013, 10:20 PM
Prove It
$\displaystyle \ln{(25)} = \ln{\left( 5^2 \right)} = 2\ln{(5)}$

Go from here.
• March 26th 2013, 01:44 AM
mathkid182
ok so ive got 2 ln 5 = 3.22?
do you think that would be the final answer or did i miss a step.

and the full working should show=

=ln (25)
=ln(5^2)
=2 ln 5
=3.22

thanks again for your help
• March 26th 2013, 01:55 AM
Prove It