Solve the problem.The cost of a computer system increases with increased processor speeds. The cost C of a system as a function of processor speed is estimated as C(s) = 12s2 - 9s + 1900, where s is the processor speed in MHz. Determine the intervals where the cost function C(s) is decreasing.
A. Nowhere
B. (0.4, ?)
C. (-?, 0.4)
D. Everywhere
Answer: C
Mathematics
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Solve the problem.The line segment joining the points (0, 2) and (8, 4) is revolved about the x-axis to generate a frustum of a cone. Find the surface area of the frustum using the parametrization x = 4t, y = t + 2, 0 ? t ? 2.
A. 12?
B. 12
C. 12?
D. 6?
Mathematics
Find the zeros of the function. Give exact answers.f(x) = x2 - 9x + 4
A. 
B. 
C. 
D. 
Mathematics
Graph the system of inequalities, and find the coordinates of the vertices.3y - 4x ? -12,y + 2x ? -4,0 ? y ? 4
A. 
B. 
C. 
D. 
Mathematics
Find functions f and g so that f ? g = H.H(x) = ?4x + 3?
A.
| f(x) = ?x?; | g(x) = 4x + 3 |
B.
| f(x) = x; | g(x) = 4x + 3 |
C.
| f(x) = ?-x?; | g(x) = 4x - 3 |
D.
| f(x) = -?x?; | g(x) = 4x + 3 |
Mathematics