7. Ms. House utilizes a strategy of "Check 1 – 2- 3". Why does she do this? How do you think this was initially taught?

Explanation:

To get her student's attention. Remember, the check 1 2 3 strategy allows teachers to get an inside into the students understanding.

However, in this scenario, Ms. House uses the strategy to lower her student's voices, so as to get their attention. She likely started using this strategy at the start of the school year and kept doing it.

answer; how many employees will be needed for jobs in the coming period;

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.