Rationalize the numerator.
A. 
B. 
C. 
D. 
Answer: C
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Find Dxy.y = 8 sinh4x
A. 32 cosh3x B. 32 sinh3x cosh x C. 32 sinh3x D. -32 sinh3x cosh x
Solve using the principle of zero products.Given that f(x) = 9x(5x + 25), find all values of a for which f(a) = 0.
A. 0, 
B. 0, 5
C. 0, - 
D. 0, -5
Provide an appropriate response.A welder can make 12 welds in an hour. How many welds can 15 welders working at this rate make in an 8 hour day?
A. 180 B. 1,440 C. 1,280 D. 640 E. none of the above
Find the domain of the function 
a. Domain: all real numbers x Vertical asymptote: No vertical asymptote Horizontal asymptote: y = 5 b. Domain: all real numbers except x = 0 Vertical asymptote: x = 0 Horizontal asymptote: y = –8 c. Domain: all real numbers except x = 5 Vertical asymptote: No vertical asymptote Horizontal asymptote: No horizontal asymptote d. Domain: all real numbers except x = 9 Vertical asymptote: x = 5 Horizontal asymptote: y = 8