Solve.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 
+ 
= 1, how many units from the center of the ellipse would the two people stand?
A. 5 units
B. 4 units
C. 3 units
D. 16 units
Answer: B
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Solve the system by graphing on a calculator. Round to the nearest hundredth if necessary.y = ln(3x - 2)x2 + 3y2 = 7
A. {(0.74, -1.47), (1.73, 1.16)} B. {(0.77, 1.46), (-0.59, -1.49)} C. {(5.25, 2.62)} D. {(1.73, -1.16), (0.74, 1.47)}
Solve and give interval notation for the solution set. Then graph the solution set.x + 4 < - 
or x + 4 > 
A. (-?, - 
) ? (- 
, ?)
B. (-?, - 
) ? (- 
, ?)
C. (- 
, - 
)
D. (- 
, - 
)
Use the table(s) to evaluate the given expression.
f -1(2)
A. 2 B. 9 C. 1 D. 6
Solve the problem.The median weekly incomes of full-time female workers for various age groups are listed in the table below. 
Let W(a) represent the median weekly income (in dollars) of women at age a years. Here is the quadratic regression equation for W: W(a) = -0.30a2 + 27.61a - 97.01Use this model to estimate the median weekly income of women at age 20.
A. $320 B. $315 C. $328 D. $335