Respuesta :

fourth root of 81 = 3
fourth root of 16 = 2
so it must be one of the ones with 3/2 in front.

you would divide all of the exponents by whatever the root is, in this case 4.
8/4 = 2
12/4 = 3
16/4 = 4

answer is A
answer a is equivalent

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good job