Determine which operation the word or phrase represents and fast 1-7 i don’t get it

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?

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it. find the area of the sidewalk.

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false