Anyone wanna talk kinda bored

By which distribution system is more than 90 percent of u.s. coal shipped? a. pipelinesb. trucksc. waterwaysd. railroadse. none of the above

Until recently, hamburgers at the city sports arena cost $4.70 each. the food concessionaire sold an average of 13 comma 000 hamburgers on game night. when the price was raised to $5.40, hamburger sales dropped off to an average of 6 comma 000 per night. (a) assuming a linear demand curve, find the price of a hamburger that will maximize the nightly hamburger revenue. (b) if the concessionaire had fixed costs of $1 comma 500 per night and the variable cost is $0.60 per hamburger, find the price of a hamburger that will maximize the nightly hamburger profit.

Winston churchill's stamp collection was valued at $14 million when he died. at auction, it brought in only $4 million. what was it worth? why?