Answer the question about the given function.Given the function f(x) = 
, what is the domain of f?
A. {x|x ? 9}
B. {x|x ? -9}
C. {x|x ? 
}
D. {x|x ? 6}
Answer: A
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Match the equation to the graph.
- 
= 1
A. 
B. 
C. 
D. 
Factor the sum or difference of two cubes.343x3 - 729
A. (7x - 9)(49x2 + 63x + 81) B. (7x - 9)(49x2 + 81) C. (7x + 9)(49x2 - 63x + 81) D. (343x - 9)(x2 + 63x + 81)
Find all rational zeros of f. Then (if necessary) use the depressed equation to find all roots of the equation f(x) = 0.f(x) = x4 + 3x3 - 4x2 - 10x - 4
A. {1, -2, -2 + 
, -2 - 
}
B. {-1, 2, -2 + 
, -2 - 
}
C. {-1, -2, -2 + 
, -2 - 
}
D. {-1, 3, -2 + 
, -2 - 
}
?Find the speed v, in miles per hour, that will minimize costs on a 125-mile delivery trip. The cost per hour for fuel is 
dollars, and the driver is paid 
dollars per hour. (Assume there are no costs other than wages and fuel.)
?
A. ?75 mph B. ?125 mph C. ?200 mph D. 80? mph E. ?40 mph