7
QuizMultiple Choice
Graphing Polar Equations — Unit test
Question 7 • CUSD Advanced Math A (5.0)
A pair of listening posts is 4,000 ft apart. They both pick up a sound, but one listening post records the sound 1.5 seconds after the other listening post. The sound is d1 feet from the first listening post and d2 feet from the second listening post. Assume sound travels at 1,100 ft/s. Which equation of a hyperbola can be used to determine possible locations of the origin of the sound?Note that
Answer
A
StartFraction x squared Over 825 EndFraction minus StartFraction y squared Over 1,175 EndFraction = 1
B
StartFraction x squared Over 680,625 EndFraction minus StartFraction y squared Over 3,319,375 EndFraction = 1
C
StartFraction x squared Over 680,625 EndFraction minus StartFraction y squared Over 4,000,000 EndFraction = 1
D
StartFraction x squared Over 2,722,500 EndFraction minus StartFraction y squared Over 13,277,500 EndFraction = 1