Find the exact value of y, or state that y is undefined.y = cos-1 
A. 
B. - 
C. 
D. 
Answer: C
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Find an equation of the hyperbola with vertices (0,±6) and asymptotes  FIGURE 1.png)
What will be an ideal response?
Solve the problem.A diagonal crosswalk at an intersection of First Street and Grand Avenue is the hypotenuse of a triangle in which crosswalks across each street are the legs. First Street is 27 feet wide and Grand Avenue is 46 feet wide. How much shorter is the distance traveled by pedestrians using the diagonal crosswalk rather than using both crosswalks that form the legs of the triangle.
A. 19.7 feet B. 53.3 feet C. 7.3 feet D. 19 feet
Solve the problem.The orbit of a planet in a distant system is an ellipse with a sun at one focus. For x and y in millions of miles, the equation of the orbit is 
Find the smallest distance (the perigee) from the planet to the sun. (Use the fact that 
where 
) 
A. 89.2 million mi B. 73.8 million mi C. 74.2 million mi D. 81.7 million mi
Find an equation in slope-intercept form (where possible) for the line.Through (6, 4) and (7, 4)
A. x = 6
B. y = 4
C. - 
x + 6y = 0
D. - 
x + 7y = 0