What is an advantage of using a credit card? Answer choices:
A. It will not affect your credit score or credit history

B. Since it is tied directly to your checking account, it prevents you from spending money you do not have

C. If you pay off your balances every month in full, it's like getting a short-term interest-free loan

answer; management is about coping complexity and leadership is about coping with change; i believe this is correct; ///good luck                                          

(b) management: leadership

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.