6. The velocity of a particle on a co-ordinate line is given by v(t)=t² +3t -10 ft/min where t20 and is measured in minutes. a. Find the displacement of the particle in the first 3 minutes. b. Write, but do not evaluate, an expression to find the total distance traveled by the particle in the first 3 minutes. c. When is the velocity of the particle decreasing?

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