A man standing near a radio station antenna observes that the angle of elevation to the top of the antenna is b? = 67°. He then walks 100 feet further away and observes that the angle of elevation to the top of the antenna is ?a? = 45°. Find the height of the antenna to the nearest foot. (Hint: Findxfirst.)
?
?
A. 
ft
B. 
ft
C. 
ft
D. 
ft
E. 
ft
Answer: A
Mathematics
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Use a graphing calculator to determine which expression completes the identity.The expression 
? csc x is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. csc x - tan x B. cos x - 1 C. sec x + cos x D. tan2x
Mathematics
Solve the problem.If the average cost per unit C(x) to produce x units of plywood is given by C(x) = 
, what do 200 units cost?
A. $6000.00 B. $20.00 C. $299.95 D. $285.71
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Evaluate.-4.8 ÷ 0.06
A. -47.4
B. -4.74
C. -80
D. 
Mathematics
Graph the set of numbers on a number line.
A. 
B. 
C. 
D. 
Mathematics