Flagstaff is a college town and tourist destination in Northern Arizona with easy access to skiing, camping, and the Grand Canyon. It is located 144 miles from Phoenix along a highway that we will assume has a speed limit of 65 miles per hour the entire way. If you are leaving Phoenix and need to arrive in Flagstaff by 4:00 pm, what time should you leave? In this case we use the speed limit as an imaginary constant speed a car could travel between Phoenix and Flagstaff to give us an idea about the trip length in hours. Sometimes we are likely to be traveling slower (and sometimes maybe a bit faster). a. Using the given information, how long do you estimate it takes to drive from Phoenix to Flagstaff (assuming no stops and no unforseen problems)? Round to the nearest quarter hour (or 15 minutes). hours b. If you drive straight between the two cities (with no stopping) and you plan an extra 30 minutes for unforseen delays, which of the following is the best time to leave based on your answer to part (a)? 1:15pm 12:45pm 12:15pm 1:45pm 2:15pm