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Help mee please. The time t in seconds or a car to skid 12 feet is given by 12 = -12t + 9t^2. Solve for t
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12 = -12t + 9t^2 => 0= 9t^2 -12t - 12. now use quadratic formula with a = 9, b=-12, c=-12
2 seconds
3t^2-4t-4=0 then roots are -2/3 and +2 since t cannot be negative it is 2 seconds
Thank you so much !
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