# Thread: Please help with this question!

1. ## Please help with this question!

Given ln 5 1.6

use the log laws to approximate ln 25

any help would be great!

2. ## Re: Please help with this question!

$\displaystyle \ln{(25)} = \ln{\left( 5^2 \right)} = 2\ln{(5)}$

Go from here.

3. ## Re: Please help with this question!

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

4. ## Re: Please help with this question!

That is correct (although of course your final step should have an approximate sign, not an equals sign).

5. ## Re: Please help with this question!

thats great thanks very much for your support!!