Explain what happens when you round 4.999 to the nearest tenth?

Which of the following is the correct ratio for converting kilograms to grams

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

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?