Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. 
saddle point; 
B. 
local minimum; 
local minimum
C. 
saddle point
D. 
local maximim
Answer: C
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Change the mixed number to an improper fraction.7
A. 
B. 
C. 
D. 
Solve the problem.A truck driver started a trip at an average speed of 70 miles per hour. Once snow began to fall, he had to drop his speed to 50 miles per hour. It took him 14.2 hours to reach his destination, which was 804 miles away. How many hours after the driver started did the snow begin to fall?
A. 4.5 hr B. 4.7 hr C. 9.5 hr D. 9.7 hr
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
Complete the ordered pairs. Then graph the equation by plotting the points and drawing a line through them.
(0, ), (4, ), (-4, )
A. (0, 1), (4, 4), (-4, -2)
B. (0, -1), (4, -4), (-4, 2)
C. (0, 0), (4, -3), (-4, 3)
D. (0, 1), (4, -2), (-4, 4)