math help please!!!
posted by penny
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

DrBob222
100^12/100^8 = 100^128 = 100^?
When you move the 100^8 from the denominator to the numerator, you change the sign of the exponent and 128 = 4. 
penny
Thank you😳

Hamburger Helper
DO you now understand?
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