At t = 0, a particle leaves the origin with a velocity of 12 m/s in the positive x direction and moves in the xy plane with a constant acceleration of 
m/s2. At the instant the y coordinate of the particle is 18 m, what is the x coordinate of the particle?
A. 30 m
B. 21 m
C. 27 m
D. 24 m
E. 45 m
Answer: C
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