Solve the problem.A formula used by an engineer to determine the safe radius of a curve, R, when designing a road is: 
where ? is the superelevation of the road and V is the velocity (in feet per second) for which the curve is designed. If 
ft per sec, f = 0.1
and 
find R. Round to the nearest foot.
A. R = 1312 ft
B. R = 1325 ft
C. R = 1315 ft
D. R = 1318 ft
Answer: C
Mathematics
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