Evaluate without the use of a calculator.cos-1 
A. 
B. 
C. 
D. 
Answer: D
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Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.Foci at (0, -20), (0, 20); asymptotes: y = 
x, y = - 
x
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Find the indicated measure of central tendency.The speeds (in mi/h) of the cars passing a certain checkpoint are measured by radar. The results are shown below. Find the mode(s) of these speeds.44.0?42.1?43.9?44.3?40.240.2?42.1?42.0?42.8?44.344.0?42.0?44.3?41.2?42.144.8?44.8?43.9?41.2?44.0
A. 42.1 B. 44.0 C. 44.0, 44.3, 42.1 D. 43.47
Perform the operation and give the answer as a fraction in lowest terms.
A. 
B. 
C. 
D. 
Solve.An elliptical bicycle path is constructed in a local park. The equation of the ellipse that represents the path, in yards, is given by 
+ 
= 1. What are the length and the width of the bicycle path?
A. length: 65 yd; width: 40 yd B. length: 80 yd; width: 130 yd C. length: 130 yd; width: 80 yd D. length: 40 yd; width: 65 yd