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The traffic flow rate (cars per hour) across an intersection is r(t) - 300 + 900t - 120t, where t is in hours, and t=0

The traffic flow rate (cars per hour) across an intersection is r(t) - 300 + 900t - 120t, where t is in hours, and t=0 is 6am. How many cars pass through the intersection between 6 am and 8 am? cars Submit

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