What's the median for 1-5, asap plzz

Find two rational expressions that have the difference of 2-n/n-4

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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. how many hours after the truck's departure will the two meet?