Determine whether the pair of vectors is orthogonal.
, 
A. Yes
B. No
Answer: B
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Solve the equation by factoring.x2 + 12 = 8x
A. {-2, -6} B. {-2, 6} C. {2, 6} D. {2, -6}
Solve the exponential equation.64 = 45x ? 16x2
A. -3 , 
B. -3 , -4
C. 3 , - 
D. 3 , 4
Solve the problem.The distance d in miles that can be seen on the surface of the ocean is given by 
where h is the height in feet above the surface. How high (to the nearest foot) would a platform have to be to see a distance of 
A. 272 B. 408 C. 121 D. 110
Solve the problem.In 1838, the German mathematician and astronomer Friedrich Wilhelm Bessel was the first person to calculate the distance to a star other than the Sun. He accomplished this by first determining the parallax of the star, 61 Cygni, at 0.314 arc seconds (Parallax is the change in position of the star measured against background stars as Earth orbits the Sun. See illustration.) If the distance from Earth to the Sun is about 150,000,000 km and ? = 0.314 seconds = 
minutes = 
degreesdetermine the distance d from Earth to 61 Cygni using Bessel's
figures. 
What will be an ideal response?