In marginal analysis, when comparing costs and benefits, an optimal choice is found when . (Note: MB = marginal benefit, MC = marginal cost, TB = total benefit, and TC = total cost.) Select the correct answer below:
a. MB≥MC
b. MB c. TB=TC
d. TB>TC

You manage an equity fund with an expected risk premium of 10% and a standard deviation of 14%. the rate on treasury bills is 6%. your client chooses to invest $60,000 of her portfolio in your equity fund and $40,000 in a t-bill money market fund. what is the expected return and standard deviation of return on your client’s portfolio?

Identifying transactions national park tours co. is a travel agency. the nine transactions recorded by national park tours during may 2019, its first month of operations, are indicated in the following t accounts: cash (1) 75,000 (2) 900 (7) 8,150 (3) 1,600 (4) 6,280 (6) 2,700 (9) 2,500 accounts receivable (5) 12,300 (7) 8,150 supplies (2) 900 (8) 660 equipment (3) 8,000 accounts payable (6) 2,700 (3) 6,400 beth worley, capital (1) 75,000 beth worley, drawing (9) 2,500 fees earned (5) 12,300 operating expenses (4) 6,280 (8) 660 indicate for each debit and each credit (a) whether an asset, liability, owner's equity, drawing, revenue, or expense account was affected and (b) whether the account was increased (+) or decreased account debited account credited transaction type effect type effect (1) (2) (3) (4) (5) (6) (7) (8) (9)

Bella is the new president of first edition, a group dedicated to the promotion of english literacy in first-generation immigrant communities. in the two years that have passed since bella took the position, the organization's members have become more passionate about their mission and intensified their activities—they put in long hours teaching children to read, promoting the program to parents, and soliciting donations. bella's strength is in her ability to inspire others and make them believe that they are part of something greater than themselves. which term best captures bella's leadership style? a. transactional b. transformational c. legitimate authority d. absolute authority