Find the length of the unknown side of the right triangle. In each case, a and b represent the lengths of the legs and c represents the length of the hypotenuse.
a = 15, c = 25; find b
A. 625
B. 20
C. 850
D. 5
Answer: B
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A. Freshmen B. Sophomores C. Juniors D. Seniors
Determine whether the function is one-to-one.f(x) = 12
A. One-to-one B. Not one-to-one
Solve the quadratic equation in the complex number system by completing the square.8y2 + 1 = 5y
A. 
B. 
C. 
D. 
Solve the problem.A racetrack curve is banked so that the outside of the curve is slightly elevated or inclined above the inside of the curve. This inclination is called the elevation of the track. The maximum speed on the track in miles per hour is given by
where r is the radius of the track in miles and ? is the elevation in degrees. Find the maximum speed for a racetrack with an elevation of 28° and a radius of 
Round to the nearest mile per hour.
A. 13,526 mph B. 39,350 mph C. 198 mph D. 175 mph