Question 1085540
When expressing numbers using scientific notation, the exponent on the 10 is an integer.  Here are some examples:
{{{ 0.012345 =  1.2345x10^-2 }}}
{{{ 123.45 = 1.2345x10^2 }}}
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From what you said in your last message, it sounds like you want to enter something like {{{ 12^(-3.2) }}}  and your calculator is giving an error.   If that's the case, try  {{{ 12^-3.2 }}} and see if that works (i.e. add parenthesis around the exponent).  If it doesn't, you might have to do  {{{ 1/12^(3.2) }}}  which would be unusual but is mathematically correct because {{{ x^(-n) = 1/x^n }}}

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Please provide a specific example if you are still having problems with exponentiation.