Answer:
5s = 590
s = 180 second head start for tortoise
a) f(t) = 1,200 - 5t
b) 1,200 - 5t = 0
5t = 1,200
t = 240 seconds
c) g(t) = 1,200 - 9(t - 180) (t ≥ 180)
d) 1,200 - 9(t - 180) = 0
1,200 - 9t + 1,620 = 0
2,820 - 9t = 0
9t = 2,820
t = 313.3 seconds
e) The tortoise won the race.