at an intersection the red light times are normally distributed with a mean time of three minutes and a standard deviation of 0.25 minutes approximately what percent of red light slash between 2.5 and 3.5 minutes

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graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

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the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.