SAT Math Multiple Choice Practice Question 110: Answer and Explanation

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Question: 110

22. If x3/4= 641/2, what does x equal?

A. 2
B. 6
C. 8
D. 16
E. 422/3

Correct Answer: D

Explanation:

D. Here's the deal: and , so . Taking the cube root of both sides gives you , and taking both sides to the fourth power gives you x = 24 = 16.

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