Two airplanes left an airport at the same time traveling in opposite directions. One travels at a speed of 190 miles per hour. The other travels 210 miles per hour. How long will it take for the planes to be 2000 miles apart?
plane 1s speed function is a = 190t and 2 is b = -210t lets times each by 10. 1900 -2100 1900-(-2100) 4000 now 5 950 -1050 950-(-1050) 2000 the answer would be 5 hours when they are at least 2000 mi apart
