Find the value of d2y/dx2 at the point defined by the given value of t.x = csc t, y = 4 cot t, t = 
A. 4
B. -8
C. -12
D. 8
Answer: C
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Simplify the expression. Assume that all variables are positive when they appear.
- 
A. 2 - 3
B. 5
C. 3
- 2
D. 2
- 3
State the domain of the rational function.f(x) = 
A. (-?, ?) B. (-?, -7) ? (-7, ?) C. (-?, 7) ? (7, ?) D. (-?, - 2) ? (- 2, 2) ? (2, ?)
Use a graphing calculator to construct a table of values for the given function.Use a graphing calculator to display a table showing the (approximate) values of the function 
at 3.7, 4.1, 4.5, 4.9, 5.3, 5.7.
A. 
B. 
C. 
D. 
Use a proportion to solve the problem.On Hector's bicycle, the ratio of pedal turns to rear-wheel turns in second gear is 4 to 7. If his rear wheel turns 392 times per mile, how many times does he turn the pedal in one mile?
A. 224 times B. 686 times C. 396 times D. 399 times