Express as a single logarithm.3logbq - logbr
A. logb(q3 - r)
B. logb
C. logbq3 ÷ logbr
D. logb
Answer: D
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Solve the problem.A whispering gallery is a room in the shape of an elliptic reflector. If a source of sound is placed at one focal point of an elliptic reflector, the sound is reflected through the other focal point. If one person speaks at one focal point, then another person at the other can hear sounds as faint as a whisper. If the whispering gallery is based on the ellipse 
how many units from the center of the ellipse would the two people stand?
A. 5 units B. 4 units C. 16 units D. 3 units
Find the focus and directrix of the parabola.y2 - 24x = 0
A. (6, 0); x = 6 B. (6, 0); x = -6 C. (0, 6); y = -6 D. (6, 0); y = -6
Perform the indicated operation. Write the answer in standard form.(-4 - 6i)(4 + i)
A. -22 + 20i B. -10 + 20i C. -10 - 28i D. -22 - 28i
Graph the system of inequalities.x + 3y ? 32x - y ? -8
A. 
B. 
C. 
D. 