A truck's distance from a warehouse, d, (measured in miles) is modeled by the formula d = t^2 + 55 t where t represents the number of hours since the

truck left the warehouse. The truck's destination is 428.25 miles away. a. How many hours will it take the truck to reach its destination? (You may need to use your graphing calculator to answer this question). b. A car left the warehouse at the same time as the truck and its driver plans to arrive at the destination (by driving the same route as the truck) at the same time as the truck. What constant speed should the car travel to reach the destination at the same time as the truck?