Solve the problem.The minimum length L of a highway sag curve can be computed by L = ,where ?1 is the downhill grade in degrees (?1< 0°), ?2 is the uphill grade in degrees (?2> 0°), S is the safe stopping distance for a given speed limit, h is the height of the headlights, and ? is the alignment of the headlights in degrees. Compute L for a 55-mph speed limit, where   

alt="" style="vertical-align: -11.0px;" />  and   Round your answer to the nearest foot.



A. 601 ft

B. 634 ft

C. 651 ft

D. 617 ft


Answer: D

Mathematics

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