i need someone to check my work.
question posted below
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OpenStudy (anonymous):
OpenStudy (anonymous):
what did you get?
OpenStudy (anonymous):
i got \[4^{2}\]
OpenStudy (anonymous):
close... lets start with the top: whats 4^3*4^4
OpenStudy (anonymous):
\[4^{7}\]
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OpenStudy (anonymous):
perfect, now divide that by 4^9
OpenStudy (anonymous):
you subtract it not divide it dont you
OpenStudy (anonymous):
well you divide the expression; but you get you answer my subtracting the exponents
OpenStudy (anonymous):
you subtract 9 from 7 and then you cant have a negative exponent on the top so you bring it to the bottom by putting a 1 ove the \[4^{2}\] so it becomes \[\frac{ 1 }{ 4^{2} } or just 4^{2}\]
OpenStudy (anonymous):
no, thats fine' you should have 4^-2
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OpenStudy (anonymous):
thats not even an answer
OpenStudy (anonymous):
\[4^{-2}=\frac{ 1 }{ 4^2? }\]
OpenStudy (anonymous):
yes because by putting it from the top to the bottom or vise versa it changes it from a negative exponent to a positive
OpenStudy (anonymous):
yup
OpenStudy (anonymous):
you can simplify 1 over 4 squared to just 4 squared
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OpenStudy (anonymous):
afraid not
OpenStudy (anonymous):
think about it 4^2 is 16
OpenStudy (anonymous):
but 1/4^2 is 1/16
OpenStudy (anonymous):
so is 1 over 4^2
OpenStudy (anonymous):
yes it is
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OpenStudy (anonymous):
okay so if your simplifying it you could just say 4^2