Find the domain of the given function.f(x) = 
A. [- 
, ?)
B. (-5, ?)
C. [5, ?)
D. (
, ?)
Answer: A
Mathematics
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Perform the indicated operation.For a heat-seeking rocket in pursuit of an aircraft, the distance d (in km) from the rocket to the aircraft is 
, where t is the angle shown in the figure. Find d to two decimal places for t = 120°.
A. 306.19 B. 166.67 C. 379.92 D. 1046.93
Mathematics
Write the rational expression in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Factor.x2 + 6x + 9 - 16z2
A. (x - 3 - 4z)(x + 3 + 4z) B. (4z(x + 3))2 C. (x + 3 - 4z)2 D. (x + 3 - 4z)(x + 3 + 4z)
Mathematics
Determine whether the statement is true or false.The sum of zero and a positive number is always a positive number.
A. True B. False
Mathematics