Use a cubic or quartic regression (as specified) to fit a curve through the points given in the table. Round to the nearest hundredth.
(Cubic)
A. y ? -1.53x3 + 0.24x2 - 2.07x + 0.36
B. y ? -1.53x3 + 0.54x2 - 2.07x + 0.36
C. y ? -1.53x3 + 0.24x2 - 2.57x + 0.36
D. y ? -1.83x3 + 0.24x2 - 2.07x + 0.36
Answer: A
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A. -1 ± 
B. 
C. 
D. 
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A. 700 B. 600 C. 690 D. 800
Solve the equation for the specified variable.A = P(1 + nr) for r
A. r = 
B. r = 
C. r = 
D. r = 
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. 16 units B. 3 units C. 4 units D. 5 units