Find the domain of the rational function.f(x) = 
A. {x|x ? 0, x ? 4}
B. {x|x ? -2, x ? 2, x ? -8}
C. {x|x ? -2, x ? 2}
D. all real numbers
Answer: A
Mathematics
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Factor completely.2z - 18
A. 2(z + 9) B. 2(z - 18) C. 2(z - 9) D. 9(z - 2)
Mathematics
Solve the problem.The distance d in miles that can be seen on the surface of the ocean is given by 
where h is the height in feet above the surface. How high would a platform have to be to see a distance of 16.5 miles? Round to the nearest foot.
A. 110 ft B. 408 ft C. 121 ft D. 272 ft
Mathematics
Multiply. Express the answer as a single polynomial in standard form.-6x3(6x + 1)
A. -42x3 B. -36x4 - 6x3 C. -36x - 6 D. -36x4 + 1
Mathematics
Evaluate the sum. Round to the nearest hundredth, if necessary.
A. 36 B. 66 C. 18 D. 33
Mathematics