anonymous
  • anonymous
how you knew whether to use a positive or a negative exponent.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
how old are you?
anonymous
  • anonymous
what math class? :)
anonymous
  • anonymous
@zzr0ck3r

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zzr0ck3r
  • zzr0ck3r
it depends. A negative exponent, just means put it all under 1 and make the exponent positive. \(2^{-1}=\dfrac{1}{2^1}=\dfrac{1}{2}\) \(3^{-4}=\frac{1}{3^4}\) Make sense?
anonymous
  • anonymous
so if i wanted to change this into a scientific notation how would i determine if it was negative or positive?
anonymous
  • anonymous
131,000,000 ft.
anonymous
  • anonymous
u didn't ask my question hmmm i asked that to know the things you already know|dw:1442525200620:dw|
anonymous
  • anonymous
8th :)
anonymous
  • anonymous
if you move from left the exponent is positive from right, negative
anonymous
  • anonymous
is this from chemistry?
zzr0ck3r
  • zzr0ck3r
\(0.0003896=3.896\times 10^{-4}\) \(3896000=3.896\times 10^6\)
anonymous
  • anonymous
no this was the question i had The circumference of the Earth is approximately 131,000,000 ft. a. Write this number in scientific notation and tell how you knew whether to use a positive or a negative exponent.
zzr0ck3r
  • zzr0ck3r
\(131000000=1.31\times 10^8\) We want it so that there is only one number before the decimal. Since we need to move it left \(6\) times we get a positive \(6\).
anonymous
  • anonymous
oh well he already did the work i'm about to do...
anonymous
  • anonymous
ohhh ok thank you soo much for helping me!:D
zzr0ck3r
  • zzr0ck3r
no problem.
zzr0ck3r
  • zzr0ck3r
that \(6\) shuold be an \(8\)..
anonymous
  • anonymous
gotcha :)

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