Find the volume of the solid generated by revolving the region about the given line.The region in the first quadrant bounded above by the line y = 6, below by the line y = 
, and on the left by the y-axis, about the line y = 6
A. 50?
B. 420?
C. 60?
D. 30?
Answer: C
Mathematics
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Solve the double inequality.-28 ? -4c + 4 < -4
A. -8 ? c < -2 B. 2 < c ? 8 C. -8 < c ? -2 D. 2 ? c < 8
Mathematics
Graph the function.f(x) = 
A. 
B. 
C. 
D. 
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Find the unit vector having the same direction as v.v = -3i + j
A. u = - 
i - 
j
B. u = - 
i + 
j
C. u = -3
i + 
j
D. u = - 
i + 
j
Mathematics
Two planes leave an airport at the same time. Their speeds are 140 miles per hour and 150 miles per hour, and the angle between their courses is 38°. How far apart are they after 1.5 hours? ? Apply the rules regarding the use of significant digits after all computations are complete. ?
A. 182 mi B. 140 mi C. 150 mi D. 120 mi E. 112 mi
Mathematics