Try this explanation:
if to re-write the function f(x)=x(x²-x-6), then to make up the equation x(x²-x-6)=0, it is possible to find the zeros requred:
x(x-3)(x+2)=0, x=0;x=-2;x=3.
answer: D -2;0;3
divide total miles by time:
220 / 3.5 = 62.857
rounded to nearest tenth = 62.9 miles per hour
400*400=160,000 which is the area of the square
2*2=4 which is the area of the smaller square
160,000/4=40,000
40,000 of the smaller squares can fit inside the larger square
