D) 5
Step-by-step explanation:
5 3/8 - 5/9 = 4 59/72 = 5
Sorry if wrong! Mark brainiest if correct :D Have a great day luv!
-Bee
f(x) has value 150 at x= 0
and 0 at x= 3
so d(f(x))/dt = slope = -150/3 = -50