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 25° and a radius of 
Round to the nearest mile per hour.
A. 34,025 mph
B. 183 mph
C. 16,635 mph
D. 155 mph
Answer: D
Mathematics
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Solve the problem.In a certain coastal basin, the sea water contains 3.9 grams of salt per 1000 milliliters of water. How many grams of salt would be in 3 liters of the sea water?
A. 117 grams B. 0.117 grams C. 1170 grams D. 11.7 grams
Mathematics
Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = 4i + 2j + 8k, v = -i - 2j - 2k
A. 6
; 
i + 
k
B. 6
; 
i - 
k
C. 180; 
i + 
k
D. 180; 
i + 
j + 
k
Mathematics
Divide, if possible. Write the answer in simplest form.
A. 
B. 
C. 
D. 
Mathematics
Graph the function.y = 
- 3
A. 
B. 
C. 
D. 
Mathematics