A rectangular coordinate system is formed by two perpendicular number lines. What is the horizontal line called?
A. origin
B. second line
C. y-axis
D. first line
E. x-axis
Answer: E
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Find the value of (f ? g)' at the given value of x.f(u) = 
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A. 10? B. 3 - ? C. -10? D. -?
Complete the identity.sin(5?) sin(8?) cos(5?) cos(8?) = ?
A. 
B. 
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D. 
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The height of the coin, in feet, after t seconds is given by the function 
For what length of time will the coin be at a height of at least 90 feet?
A. 0 sec to 1 sec B. 0 sec to 5 sec C. 4 sec to 5 sec D. 5 sec to 10 sec