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sohee
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A particle moves according to a law of motion s = f(t) = t3 - 12t2 + 21t, t 0, where t is measured in seconds and s in feet.
v(t)
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i dont know if this is correct though; 4x(5) = 37 4x=37-5 4x/4=32/4 x=8 check: x=8 4(8)=37-5 32=32
