Evaluate the determinant.
A. -13
B. 40
C. 27
D. -812
Answer: D
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Solve the rational inequality. Express the solution in interval notation.
< 3
A. (-?, -9) ? 
B. (-?, -9) ? (9, ?)
C. 
D. 
? (9, ?)
Solve the problem.The Lorenz curve for the income distribution in a certain country is given by 
I) Find the Gini index of income concentration.II) Use the answer found in I) to determine if the income of this country is more equally distributed, less equally distributed, or distributed the same as a second country having an index of income concentration of 0.2.
A.
| I) | 0.33 |
| II) | less equally distributed |
B.
| I) | 0.33 |
| II) | more equally distributed |
C.
| I) | 0.25 |
| II) | more equally distributed |
D.
| I) | 0.25 |
| II) | less equally distributed |
Solve the problem.Punky went to dinner. Her bill was $15.84, and she left a 15% tip. How much was the tip, rounded to the nearest dollar?
A. $18 B. $5 C. $2 D. $32
Write a signed number for the statement.461 feet below sea level
A. 461 B. -461