Match the function with one of the graphs.f(x) = - 
x
A. 
B. 
C. 
D. 
Answer: D
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Use the rational zero theorem, Descartes's rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the equation.x3 - 75x - 250 = 0
A. -5, 5, 10 B. -10, -5, 5 C. -5, -5, -10 D. -5, multiplicity 2; 10
Solve the triangle.B = 40°, C = 90°, a = 5
A. A = 50°, b = 5.2, c = 6.53 B. A = 50°, b = 6.53, c = 4.2 C. A = 50°, b = 7.53, c = 4.2 D. A = 50°, b = 4.2, c = 6.53
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log213 -5
A. 2log513 B. 13log25 C. -10 log 13 D. -5log213
Solve the problem.A survey of the interest rates earned by Certificates of Deposit (CDs) showed the following percents for the length of time (in years) for holding the CD. Let length of time represent the independent variable and interest rate represent the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the estimate of the interest rate for a CD held for 30 years (to the nearest thousandth)? 
A. 8.669 B. 8.675 C. 8.874 D. 9.064