Can someone help me with these two problems on my homework?

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?

If m is the midpoint of ln and ln=27.8 find the length of mn

Sales of a certain mp3 clock radio are approximated by the relationship s(x) = 5600x + 31,000 (0 s x s 5), where s(x) denotes the number of clock radios sold in year x(x 0 corresponds to the year 2010). find the number of clock radios expected to be sold in 2013. clock radios +-17.69 points tanapcalcbr10 2.r.041. ask your teach my notes the cost and revenue functions for a certain firm are given by c(x) = 11x 20,000 and r(x) = 19x, respectively. find the company's profit function, p(x) p(x)