at a temperature of 50°, what is the actual horizontal length? (4 points) 2) You are performing a differential level survey with an instrument that reads measurements to the nearest 0.01 foot. For what maximum distance can the Earth's curvature and refraction be neglected? (3 points) 3) A differential leveling loop is ran from BM A to a point that is 2,000 ft away and 2,100 ft back, with a misclosure