A newspaper article discussing whether Social Security could be cut offered the information shown in figure. Use the information in these graphs to answer the question.
There seems to be an error in one of the three line graphs. What is it?
A. Only one line at the bottom
B. The line graph at right begins at 1960
C. The line graph at right begins at 50 rather than 0
D. The lines are too close at the top left graph
E. There are no errors
Answer: C
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A. 0.1, -0.1 B. 0.1, -9.1 C. 9.1, -0.1 D. 9.1, -9.1
Solve.The speed of a stream is 4 mph. If a boat travels 84 miles downstream in the same time that it takes to travel 42 miles upstream, what is the speed of the boat in still water?
A. 15 mph B. 14 mph C. 12 mph D. 8 mph
Graph the parametric equation for the given interval. Add arrows to show how the curve is traced out. x = t + 1, y = (t - 1)2; 0 ? t ? 3
A. 
B. 
C. 
D. 
Find the product of the given complex number and its conjugate. Write the answer in the form a + bi.
+ 
i
A. 
- 
i
B. 2
C. 1
D. 
+ 
i