The hub is a business dedicated to providing rentable work spaces for local companies or self-employed individuals. as they begin to expand their business, they need to acquire a set of computers for an in-house computer lab. ibm offers the computers for a single payment of $55,000 due at the end of four years. dell offers similar computers, but requires four annual payments of $13,000 due at the end of each year. the hub could borrow the funds at 5%. using discounted cash flows, determine which computers the hub should purchase.

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.