The equation of motion of a projectile is \( y=12 x-\frac{3}{4} x^{2} \). The horizontal compone...

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The equation of motion of a projectile is \( y=12 x-\frac{3}{4} x^{2} \). The horizontal component of velocity is \( 3 \mathrm{~m} \mathrm{~s}^{-1} \). What is the range of the projectile?
(1) \( 18 \mathrm{~m} \)
(2) \( 16 \mathrm{~m} \)
(3) \( 12 \mathrm{~m} \)
(4) \( 21.6 \mathrm{~m} \)
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