What is the range of -23, -2.5, 3, -3, 5, 7, -22.5, 17, 12, 1

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

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?

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?