What is the difference between a and b?

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?

Which is the graph of this function 3 square root of x plus one if

Need same math paper but the back now i hope your able to read it cleary i need with hw