Exhibit 6-1 Total utility for good X
Total utility (utils)0
80
120
148
160
155
Quantity consumed per day0
  1
    2
    3
    4
    5
As shown in Exhibit 6-1, the marginal utility for the second unit consumed is:

Differentiate between principal and time value of money. John invests $100 in a bank for a year. At the end of the year he receives $125. What is the principal and time value of money in this case?

What will be an ideal response?

Average per capita water consumption in the United States was approximately how many gallons per day in 2005?

A. 440. B. 764. C. 1,941. D. 1,363.