X d 1. An airplane is flying at a constant altitude of 5 miles above the ground and passes directly over a radar antenna. When the plane is 15 miles away (d=15), the radar detects that the distance, d, is changing at a rate of 213 miles per hour. What is the change in the angle between the horizon and the tower (labeled as 6 in the picture)? 2. When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation / = where C is a constant. Suppose that at a certain instant the volume is 520 cubic centimeters per minute and the pressure is 75 KPa and is decreasing at a rate of 12 kPa/minute. At what rate in cubic centimeters per minute is the volume increasing at this instant