Solve the problem.In one area, the lowest angle of elevation of the sun in winter is 20° 24'. A fence is to be built 
away from a plant in the direction of the sun. (See drawing) Find the maximum height, x , for the fence so that the plant will get full sun. Round your answer to the tenths place.
A. 5 ft
B. 6.2 ft
C. 4 ft
D. 4.7 ft
Answer: D
Mathematics
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Use the substitution formula to evaluate the integral.
A. - 
B. 
C. - 
D. 
Mathematics
Use an Euler diagram to determine whether the argument is valid or invalid.All cats like fish.Henry does not like fish.Henry is not a cat.
A. Valid B. Invalid
Mathematics
Find the asymptotes of the hyperbola.x2 - y2 - 2x - 8y - 40 = 0
A. y + 1 = (x - 4) and y + 1 = - (x - 4)
B. y - 1 = (x + 4) and y - 1 = - (x + 4)
C. y + 4 = (x - 1) and y + 4 = - (x - 1)
D. y + 4 = 
(x - 1) and y + 4 = - 
(x - 1)
Mathematics
Solve the equation.(x - 5)2 + x2 = (x + 5)2
A. {-20} B. {0, -20} C. {0, 20} D. {20}
Mathematics