Question

Can someone help me with this?? http://img542.imageshack.us/img542/2352/webworkma105007umdf1104.png
If you can, can you explain how you did it?

Answer 1

Clickable link:
http://img542.imageshack.us/img542/2352/webworkma105007umdf1104.png

Answer 2

for first one note that
\[\frac{2}{5}=.4\] so
\[\log(.4)=\log(\frac{2}{5})=\log(2)-\log(5)\]

Answer 3

so answer to first one is
\[u-v\] others are similar

Answer 4

gimmick is to try and write the input as powers of 2 and 5 or combinations of them. for example
\[.25=\frac{1}{4}=2^{-2}\] so
\[\log(.25)=\log(2^{-2})=-2\log(2)=-2u\] etc

Answer 5

-2u is wrong for the second one :(