What the ratio to 7 to 1 written in 3 different ways

What is coefficient of the term of degree of degree 5 in the polynomial below

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Can someone tell me if this is perpendicular? !