Solve the equation for x if 
.
?
?
A. 
, 
B. 
, 
C. 
, 
D. 
, 
E. 
, ,
Answer: D
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Multiply and 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
Using the variable x, write the interval using set-builder notation.
A. 
B. {x| 5 ? x ? 1}
C. 
D. 
Two cities are approximately 600 miles apart on the surface of the earth. Assuming that the radius of the earth is 4,000 miles, find the radian measure of the central angle with its vertex at the center of the earth that has one city on one side and another one on the other side.
?
?
?a = 600 miles
?
A. 0.14 radians B. 0.135 radians C. 0.15 radians D. 0.145 radians E. 0.13 radians