Practice
3 write each set in roster form. (list the elements of each set.)
a. {x|x is a whole number between 5 and 10}
b. {x|x is a natural number greater than 40}

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?