GMAT Practice Question Set #10 (Question 28-30)

Problem Solving Question #28: Algebraic Expression with Exponents  
Time 0 0 : 0 0 : 0 0

If x is a positive integer such that `4*2^(x+2.5)` = `sqrt {2} * 0.5^(-3*x)`

What is the value of `x^3` ?


(A)

2

(B)

3

(C)

5

(D)

7

(E)

8

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