The leader-member exchange theory argues that:
a. new relationships between leaders and members are typically marked by a role taking phase. b. most leaders can judge their performance by referring to the number of companies they have created. c. leader traits holds more practical relevance than leader actions. d. the correlations of the trait-leadership magnitude are strong. e. organizations should limit leader-member exchanges to maximize organizational productivity.

A. new relationships between leaders and members are typically marked by a role taking phase

Explanation:

The leader member exchange theory focuses on the relationship between managers and the members who recently joined the team. Managers are assumed to always want the best from the new members. The interaction between new members and the leadership is portrayed by activities such as role making and role taking. According to leader-member exchange theory, it is therefore correct to say that new relationships between leaders and members are typically marked by a role taking phase. The correct answer is A.

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.