Practice:
 
Whenever you are asked to provide an EXACT solution to an exponential equation, you should not approximate any expressions which contain log's or ln's. For example if the question is:
 
Find the solution to $2^x = 11$ $\ \ \ \ x =$
 
Using log's or ln's you can determine the EXACT solution is $\frac{ \log{(11)} }{\log{(2)} }$ which is also equal to $\frac{ \ln{(11)} }{\ln{(2)} } \ $. In the blank you need to enter an expression EXACTLY equivalent to the numerical expressions ( log(11) )/( log(2) ) or ( ln(11) )/( ln(2) ) as they are typed in bold. Entering an approximation such as 3.45943 will be marked as incorrect since this is not an exact answer.

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Note: Whenever you use functions such as log or ln you need to always follow the function with a left parenthesis, then type the expression which is being plugged into the log or ln, and finally close the function by typing a right parenthesis. So if you wish to enter $\log{(2x-8)}$ and you type log2x-8 or log 2x-8 or any other expression without parentheses you have not correctly entered expression, and your answer will be marked incorrect.

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