a tortoise and a hare are competing in a 1600-meter race. the arrogant hare decides to let the tortoise have a 510-meter head start. when the start gun is fired the hare begins running at a constant speed of 9 meters per second and the tortoise begins crawling at a constant speed of 6 meters per second. define a function f to represent the tortoise's distance from the finish line (in meters) in terms of the number of seconds t since the start of the race.
