Ashanti and Cale met at Starbucks and are now returning home. Ashanti heads north at a rate of 80 yards per minute and Cale heads east at a rate of 110 yards per minute. After 15 minutes, at what rate is the distance between them changing? a. Draw a picture to represent the problem. North 80 yards/minute Ashanti distance between Cale and Ashanti East Starbucks 110 yards/minute: Cale b. Write an equation that relates Ashanti's distance from Starbucks, x, Cale's distance from Starbucks, y, and their distance from each other, z. c. Take the derivative of both sides. d. Plug in the known values and solve for the quantity you are after.