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 
+ 
= 1, how many units from the center of the ellipse would the two people stand?
A. 13 units
B. 25 units
C. 12 units
D. 5 units
Answer: D
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State whether the statement is true or false.Let A = {x|x ? N and x ? 18} B = {x|x is a continent}London ? B
A. True B. False
Solve the problem.The graph depicts the amount of water left in a bathtub. Find and interpret each intercept.
A. (0, 3); (30, 0); The bathtub initially contained 3 gallons and emptied in 30 minutes. B. (0, 3); (30, 0); The bathtub initially contained 30 gallons and emptied in 3 minutes. C. (0, 30); (3, 0); The bathtub initially contained 3 gallons and emptied in 30 minutes. D. (0, 30); (3, 0); The bathtub initially contained 30 gallons and emptied in 3 minutes.
Solve for the base. Round to the nearest cent.Part: $8.94 Rate of increase: 10%
A. $8.13 B. $9.83 C. $108.13 D. $8.94
Perform the indicated operation. Assume that all variables are nonnegative.8
+ 
- 7
A. 
+ 
B. 
C. 15
+ 
D. 