Find the foci of the hyperbola.y2 - x2 = -200
A. (10, 0) and (-10, 0)
B. (
, 0) and (-
, 0)
C. (20, 0) and (-20, 0)
D. (0, 20) and (0, -20)
Answer: C
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Graph the inequality on the number line.x ? 5
A. 
B. 
C. 
D. 
Solve the problem.The function given by f(x) = k2x/12 can be used to determine the frequency, in cycles per second, of a musical note that is x half-steps above a note with frequency k. Find the frequency of the note that is 5 half-steps above middle C (262 cycles per second). Round your answer to the nearest whole number.
A. 699 cycles per second B. 1383 cycles per second C. 14 cycles per second D. 350 cycles per second
Use analytical methods to solve the equation.
= - 
A. No solution
B. - 
C. - 
D. - 
Solve the absolute value inequality. Write the solution set using interval notation.
- 7 > 2
A. (-6, 12) B. (-?, 2) ? (6, ?) C. (-?, -6) ? (-2, ?) D. (-?, -6) ? (12, ?)