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# how do you change a^2=1.6 into a logarithm?

I understand how to do this with e or ln but not a log

### 2 Answers by Expert Tutors

Sheila M. | Friendly College Math Professor - understands students' math anxietyFriendly College Math Professor - unders...
4.9 4.9 (63 lesson ratings) (63)
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They work the same way as each other ...

You can express exponential equations using logarithms and vice versa:

logb(expression) = number ... means the same thing as bnumber = (expression).

What I tell my students is to remember to keep the bases the same, and the exponent of the base stands alone in the logarithmic expression.

Example:  log5(25) = 2  means the same thing as 52 = 25

With natural logarithms (where the base is an understood e), you do the same thing...

Example:  ln (4) = 1.3863  means the same thing as  e1.3863 = 4

Hope this helps you.

Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
4.6 4.6 (13 lesson ratings) (13)
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Attn: y = a^x is equivalent to log[base a] y = x

So, the log form of a^2 = 1.6 is log[base a] 1.6 = 2.