Use estimation to determine which calculation is incorrect.
A. 
B. 
C. 
D. 
Answer: D
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In the LORAN (LOng RAnge Navigation) radio navigation system, two radio stations located at A and B transmit simultaneous signals to a ship or an aircraft located at P. The onboard computer converts the time difference in receiving these signals into a distance difference |A| - |B|, and this, according to the definition of a hyperbola, locates the ship or aircraft on one branch of a hyperbola (see the figure). Suppose that station B is located L = 480 mi due east of station A on a coastline. A ship received the signal from B 1280 microseconds (?S) before it received the signal from A. Assuming that radio signals travel at a speed of 1000 ft/?S and if the ship is due north of B, how far off the coastline is the ship? Round your answer to the nearest mile. Select the correct answer.
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Write the expression as a logarithm of a quantity to a power. Leave answers in simplest form without negative or fractional exponents.7 logby
A. logby7 B. log7yb C. b log70y7 D. 7 logby7
Given the following properties of a triangle find side b.
Find the center, transverse axis, vertices, foci, and the equations of the asymptotes of the hyperbola.
- 
= 1
A. center: (3, -3)
transverse axis: x = 3
vertices: (3, -5) and (3, -1)
foci: (3, -3 - 2
) and (3, -3 + 2
)
asymptotes: y + 3 = - 
(x - 3) and y + 3 = 
(x - 3)
B. center: (-3, 3)
transverse axis: y = 3
vertices: (-3, 1) and (-3, 5)
foci: (-3, 3 - 2
) and (-3, 3 + 2
)
asymptotes: y + 3 = - 
(x - 3) and y + 3 = 
(x - 3)
C. center: (3, -3)
transverse axis: y = -3
vertices: (5, -4) and (4, 0)
foci: (5, -2 - 2
) and (4, -2 + 2
)
asymptotes: y + 3 = - 3(x - 3) and y + 3 = 3(x - 3)
D. center: (3, -3)
transverse axis: x = 3
vertices: (3, -3 - 2
) and (3, -3 + 2
);
foci: (3, -5) and (3, -1)
asymptotes: y + 3 = - 3(x - 3) and y + 3 = 3(x - 3)