Find the approximate circumference of the circle.Round to the nearest thousandth.
A. 12.560 ft
B. 6.280 ft
C. 12.56 ft
D. 2.540 ft
Answer: C
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Solve the problem.A construction crane lifts a 100-lb bucket originally containing 130 lb of sand at a constant rate. The sand leaks out at a constant rate so that there is only 65 lb of sand left when the crane reaches a height of 50 feet. How much work is done by the crane?
A. 4875 ft ? lb B. 11,500 ft ? lb C. 2250 ft ? lb D. 9875 ft ? lb
Round the number as indicated.2365 to the nearest thousand
A. 3000 B. 2100 C. 1900 D. 2000
Solve the problem.A pilot wants to fly on a bearing of 66.8°. By flying due east, he finds that a 50 mph wind, blowing from the south, puts him on course. Find the airspeed of the plane.
A. 117 mph B. 175 mph C. 58 mph D. 127 mph
Find a vector orthogonal to the given vectors.
and 
A. 
B. 
C. 
D. 