Solve the problem.A plane is flying at a constant altitude of 6 miles and a constant speed of 400 miles per hour on a straight course that will take it directly over an observer on the ground. How fast is the angle of elevation of the observer's line of sight changing when the horizontal distance from her to the plane is d miles and the plane is moving away from her? Give your answer in radians per hour in terms of d.
A. - 
rads/hr
B. - 
rads/hr
C. - 
rads/hr
D. - 
rads/hr
Answer: D
Mathematics
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Find the area bounded by the indicated curves.x = 2y2 - 1, x = y2 + 8
A. 
B. 27
C. 24
D. 36
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Graph.y = 
+ 3
A. 
B. 
C. 
D. 
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Provide an appropriate response.Find the area of the region bounded by the given equations: y = x2 + 6x + 10 and y = x + 6
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve.25x2 + 80x + 64 = 0
A. - 
B. 
C. - 
, 
D. - 
, 0, 
Mathematics