Find an for the given geometric sequence.a5 = 
, r = 
A. an = 
? 
n-1
B. an = 
? 
n
C. an = 9 ? 
n-1
D. an = 9 ? 
n
Answer: C
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A forester from his vantage point on a hillside sees a puff of smoke in a valley below him. He measures the angle of depression (the acute angle between the horizontal and the line of sight) to the smoke from his position to be 21°13'15" (see figure below). Find the measure of ?PSF in degrees, minutes and seconds.
Multiply.(-2x + 6)(4x - 1)
A. 2x2 + 26x - 6 B. -8x2 + 26x - 6 C. 2x2 + 26x + 26 D. -8x2 + 26x + 26
Find the domain of the composite function f?g.f(x) = 
, g(x) = 4x + 16
A. [0, ?) B. (-?, ?) C. [-4, ?) D. (-?, -4] ? [0, ?)
Solve the problem.Martha can rake the leaves in her yard in 2 hours. Her brother can do the job in 8 hours. How long will it take them to do the job working together?
A. 2
hr
B. 
hr
C. 1
hr
D. 
hr