Using the horizontal-line test, determine whether the function is one-to-one.
A. one-to-one
B. not one-to-one
Answer: A
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Solve the problem.The function t(x) = -1.29x2 + 8.80x + 42.69 represents the temperature in Riversbend, IL from 11 P.M. on March 6, 2008 until 7 A.M. on March 7, 2008, where x is the number of hours after midnight on March 6, 2008. Determine the x-coordinate of the vertex of the graph of t(x). Then use this value in the function t(x) to estimate the maximum temperature. Round your answer for the vertex to the nearest hour. Round your answer for the temperature to the nearest degree.
A. x = 3.4; t = 57.6° B. x = 3; t = 58° C. x = -3; t = -2° D. x = 3; t = 68°
Information is given about a polynomial f(x) whose coefficients are real numbers. Find the remaining zeros of f.Degree 5; zeros: 1, i, -2i
A. -1, -i, 2i B. -i, 2i C. -1, -i D. -1, 2i
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 = 7S2 - 6S + 1900, where S is the processor speed in MHz. Find the processor speed for which cost is at a minimum.
A. 0.3 MHz B. 8.6 MHz C. 0.4 MHz D. 3.4 MHz
Use long division to divide the polynomials.
A. p - 2 + 
B. p - 6 + 
C. p - 2
D. p + 2 + 