Find the exact value of the expression, if possible. Do not use a calculator.cos-1 
A. 
B. 
C. 
D. 
Answer: A
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Let matrix A represent the sales (in thousands of dollars) of a toy company in 1994 in three cities, let B represent the sales in the same cities in 1995, and let C represent the sales in the same cities in 1996. 
A = 
; B = 
; C = 
What is the change in sales between 1994 and 1996?
What will be an ideal response?
Solve the problem.A satellite following the hyperbolic path shown in the picture turns rapidly at (0, 6) and then moves closer and closer to the line y = 
x as it gets farther from the tracking station at the origin. Find the equation that describes the path of the rocket if the center of the hyperbola is at (0, 0).
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Solve the quadratic inequality. Graph the solution.(x - 6)(x + 1) > 0
A. (-?, -6) ? (1, ?)
B. (-?, -1) ? (6, ?)
C. (-1, ?)
D. (-1, 6)
Solve the problem.In a student survey, 98 students indicated that they speak Spanish, 35 students indicated that they speak French, 11 students indicated that they speak both Spanish and French, and 140 students indicated that they speak neither. How many students participated in the survey?
A. 251 B. 262 C. 122 D. 273