Solve the problem.A section of roller coaster track has the dimensions shown in the diagram. Find the grade of the track, which is the slope written as a percent. 
A. 9.18%
B. 3%
C. 34%
D. 39%
Answer: C
Mathematics
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Sketch D and g(D) from the description of D and change of variables 
u = xy, v = 
where D is the rectangle 1 ? x ? 4, 
? y ? 2
?
A.
 ? |  |
B. None of these.
C.
 ? |  |
D.
 ? |  |
Mathematics
Simplify the expression.
A. 
B. 
C. 
D. 
Mathematics
Identify the equation as either an identity or not.
= 
A. Not an identity B. Identity
Mathematics
Solve the inequality.
> 
A. (-?, -21) or (4, ?) B. (-?, -21) or (-1, 4) C. (-21, -1) or (-1, 4) D. (-21, -1) or (4, ?)
Mathematics