Alockbox plan is: a. used to identify inventory safety stocks. used to protect cash, i. e., to keep it from being stolen. b. used to speed up the collection of checks received. c. used primarily by firms where currency is used frequently in transactions, such as fast food restaurants, and less frequently by firms that receive payments as checks. d. used to slow down the collection of checks your firm writes.

Option(C) is correct.

Explanation:

Correct option:  Used primarily by firms where currency is used frequently in transactions, such as fast food restaurants, and less frequently by firms that receive payments as checks.

A lockbox plan is a service that is offered by the commercial banks to the firms. This service of bank helps the firms in collecting the payments from the customers. The customers deposited their payments into the post-office box (lockbox)  then banks transferred these payments into the company's account.

Lockbox services also known as remittance services or remittances processing.

answer loneliness;

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.