Find the reciprocal of the number or expression. Assume variables do not cause any denominators to equal 0.
A. 
B. 
C. -19
D. 
Answer: A
Mathematics
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Find the exact function value.cos-1(0)
A. 
B. 0
C. 
D. 
Mathematics
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves about the given lines.y = 3x,
y = 0,
x = 2; revolve about the x-axis
A. 24? B. 12? C. 48? D. 12
Mathematics
Solve. Graph the solution on a number line, and express it in interval notation.1 ? 2x - 3 ? 9
A. -6 < x < -2, (-6, -2)
B. 2 < x < 6, (2, 6)
C. -6 ? x ? -2, [-6, -2]
D. 2 ? x ? 6, [2, 6]
Mathematics
Solve the problem.A trough is to be made with an end of the dimensions shown. The length of the trough is to be 
long. Only the angle ? can be varied. What value of ? will maximize the trough's volume?
A. 7° B. 32° C. 30° D. 53°
Mathematics