Identify the following numbers using 2’s complement by making suitable assumptions:
a. 1710 + 610
b. 2110 – 410
c. -1310 - 2010

Suppose there are two countries – Home and Foreign – that produce only coffee and sugar. It takes home workers three hours to produce a bag of coffee; and four hours to produce a bag of sugar. Foreign country is less productive – their workers spend seven hours to make a bag of coffee and a half of a day (twelve hours!) to eventually produce a bag of sugar.

1. Which country has an absolute advantage in coffee? Sugar? Explain intuition in 1-2 brief sentences

2. Which country has a comparative advantage in coffee? Sugar? Explain intuition in 1-2 brief sentences

3. Suppose Foreign country made a technical innovation which improved productivity there by one-third. In other words, foreign workers now spend one-third less time producing a bag of sugar than previously. How does your answer for part b) change?

4. Inspired by sugar producers, Foreign country created packaging technology that allowed them to decrease time to produce a bag of coffee by an hour. How does you answer to part b) change after both improvements?

5. The flow of history was exceptionally unsuccessful for Home country – it was colonized, and home worker morale decreased. As a result, Home country lost most of the mechanical innovations and their productivity become three times slower (i.e. both production times were tripled). Likewise, Foreign country kept all improvements discussed in the previous parts. How do your answers for both parts a) and b) change?

(TCO 2) Describe how PLCs detect whether a switch is open or closed.

please compare and explain the IS-LM curve in a closed economy and a small open economy

Is use of leverage common among Closed-End or Open-End funds? Why?

The 2010 General Social Survey asked the question: “For how many days during the past 30 days was your mental health, which includes stress, depression, and problems with emotions, not good?” Based on responses from 1,151 US residents, the survey reported a 95% confidence interval of 3.40 to 4.24 days in 2010.

(a) Interpret this interval in the context of the data.

(b) What does “95% confidence” mean? Explain in the context of the application.

(c) Suppose the researchers think a 99% confidence level would be more appropriate for this interval. Will this new interval be smaller or larger than the 95% confidence interval?