I have a few problems I am having difficulty with if someone wouldn't mind helping me please. I am a little confused on how to show these types of problems. I can do a few but these ones are getting to me.

thank you!!

First problem:

Write in logarithmic from

square root sign only over the #36 then = 6

Second Problem:

simplify expression:

In e^5x

third problem:

solve equation:

3^x-2=81

& the fourth is the same to solve the equation:

log x= 1 over2

25