Find the average rate of change of the function as x changes from a to b.f(x) = x2 - 2; a = 1, b = 5
A. -4
B. -6
C. 6
D. 0
Answer: C
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Use the quotient rule to simplify.
A. 
B. 
C. 
D. 
Solve the equation 
. Restrict your attention to the horizontal span of 0 to 5. Round your answer to two decimal places if necessary.
?
A. 4.87 B. 3.14 C. 2.69 D. 3.99
Solve the problem.In a survey of 1000 Americans, 850 said that they own a cell phone. Assume that the survey was properly conducted and that the 1000 people surveyed represent an unbiased sample of the entire population. Compute a 99.7% confidence interval (expressed using percents) for this survey.
A. 84.08% to 85.02% B. 84.8% to 85.2% C. 83.9% to 86.1% D. 82.8% to 87.2% E. 81.7% to 88.3%
Solve the problem.How many different three-digit numbers can be written using digits from the set 
without any repeating digits?
A. 20 B. 120 C. 10 D. 60