math help please!!!

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In this question how do you know when to add or subtract?? Simplify
100^12/100^8

A.100^12/8
B.100^96
C.100^4
D.100^20

Is the answer C or D?? Thank you

  • math help please!!! -

    100^12/100^8 = 100^12-8 = 100^?
    When you move the 100^8 from the denominator to the numerator, you change the sign of the exponent and 12-8 = 4.

  • math help please!!! -

    Thank you😳

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