Determine the domain and the range of the function.f(x) = x2 - 8x + 7
A. domain: all real numbers
range: {y|y ? 9}
B. domain: all real numbers
range: all real numbers
C. domain: all real numbers
range: {y|y ? -9}
D. domain: {x|x ? -4}
range: {y|y ? -9}
Answer: C
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Solve the equation by completing the square.x2 - 8x + 15 = 0
A. 12, 3
B. ±
C. 5, 3
D. -5, -3
Find all solutions to the equation. Express the solution in degrees.cos x = -1
A. 360°n or 180° + 360°n B. 180° + 360°n C. 360°n D. 90° + 360°n or 270° + 360°n
Solve the problem.In a particular situation, the pressure, P, exerted on a person's eardrum at a distance of 6 feet from the source is given by the function: P(t) = 
cos (2n? - ct) , where n is a positive integer. Use the difference identity for cosine to simplify P in this situation.
A. P(t) = cos (ct)
B. P(t) = 
cos (ct)
C. P(t) = 
cos (ct + 6)
D. P(t) = 
cos (ct) - 
sin (ct)
Use the region R to evaluate the double integral.
RR bounded by x = 0, y = 1, y = x
A. 
B. - 
C. 
D. - 