Part a)

An airplane flying north at 480 miles per hour passes over a certain town at noon. A second airplane going east at 300 miles per hour is directly over the same town 15 minutes later. if the airplanes are flying at the same altitude, how fast will they be separating at 1:15 P.M.? miles per hour See Example 3 page 138 for a sketch and a similar example.As the sun sets behind a MCI-foot building, the building's shadow grows. How fast is the shadow growing (in feet pet second) when the sun's ray make an angle of 11/3 radians? See Example 5 page 139 for a sKetcn and a similar example. You Will also need the rate defdt round in the example. A woman standing on a cliff is watching a motorboat through a telescope as the boat approaches the shoreline directly below her. If the telescope is 100 feet above the water level and if the boat is approaching at 40 feet per seconds, at what rate is the angle of the telescope changing when the boat is 100 feet from the shore? negative radian per second See Example 4 page 139 for a sketch and a similar example