# Math Help - evaluate or simplify without using a calulator

1. ## evaluate or simplify without using a calulator

In e(with an exponent of 4)

2. Originally Posted by J_Pettway
In e(with an exponent of 4)
= 4 ln e = 4

using logarithm rules you should be familiar with.

3. ## solve the expotiential equation and put answer in solution set of natural logarithms

5^8x=3.9

4. Originally Posted by J_Pettway
5^8x=3.9
Take log (your choice of base) of both sides:

log 5^8x = log 3.9 => 8x log 5 = log 3.0 => .......

And ...... New thread for new questions!!.