For the given functions f and g, find the requested function and state its domain.f(x) = 2x - 4; g(x) = 9x - 9Find f - g.
A. (f - g)(x) = 11x - 13; 
? 
B. (f - g)(x) = 7x - 5; (-?, ?)
C. (f - g)(x) = -7x + 5; (-?, ?)
D. (f - g)(x) = -7x - 13; 
? 
Answer: C
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What will be an ideal response?
Simplify.
A. 
B. 
C. 
D. 
Solve the problem.The distance d (in miles) to the horizon at an altitude of h feet above sea level is given by the equation 
Simplify the right-hand side of the equation and determine what would be the distance from the top of a 1120 foot tall building to the horizon. Assume that the base of the building is at sea level. Round to the nearest tenth when necessary.
A. d = 
; 20.5
B. d = 3
; 100.4
C. d = 
; 142
D. d = 
; 41
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A. {(0, - 6)} B. {(0, 6)} C. {(- 6, 0)} D. {(6, 0)}