Mathematics
OpenStudy (anonymous):

how do you solve 3^x = 20 on a graphing calculator?

OpenStudy (anonymous):

well answer is $x=\frac{\ln(20)}{\ln(3)}$ for sure

OpenStudy (anonymous):

by change of base formula if you want to solve $b^x=A$ for x the answer is $x=\frac{\ln(A)}{\ln(b)}$

OpenStudy (anonymous):

thx!

OpenStudy (anonymous):

in english, the log of the total divided by the log of the base. you can use $x=\frac{\log(A)}{\log(b)}$ to they both work

OpenStudy (anonymous):

*too

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