.75 Rounded to the nearest thousandth would be 0.750
Use desmos.com and graph those inequalities. It is pretty easy.
Answer:
V = D/t = 10 / 20 = 0.5 mile per min
V = D/t = 20/30 = (2/3) mile per min
V = D/t = (10+20)/ 50 = (3/5) mile per min
There's a site called m.a.t.h.w.a.y, and you can type in those functions in order to get the graph ;)
