John and jean are married and decide to open three separate accounts for their money. what is the most likely reason for their decision? they have too much money and can’t keep it in a single account. john and jean are part of a dual-income family. the bank does not allow more than one person to open an account. they want someone else to handle their finances.

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.