Find the exact value of the expression. Do not use a calculator.sin 135° - sin 270°
A. 
B. 2
C. 
D. 
Answer: C
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Solve the problem.Rule: The sum of any two horizontally adjacent numbers is the number immediately below them. Use this rule to complete the array. 
A. 
B. 
C. 
D. 
Solve the problem.Two recording devices are set 3600 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 200 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
A. 1241.22 ft B. 1788.85 ft C. 425 ft D. 7375.64 ft
Match the equation to the graph.(x + 1)2 = 7(y - 1)
A. 
B. 
C. 
D. 
Express as a difference of logarithms.loga 
A. loga D - loga K B. loga D ÷ loga K C. loga (D - K) D. loga K - loga D