Write interval notation.{ x ? x > -3 }
A. [-3, ?)
B. (-3, ?)
C. (-?, -3)
D. (-?, -3]
Answer: B
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Solve the problem.In 2004, exit polls on the day of the election showed presidential candidate John Kerry ahead of George W. Bush. Later, it was found that those that voted for Bush were less interested in answering exit polls than other voters. This fact illustrates that the 2004 presidential exit polls were flawed because
A. of sampling variability. B. the sample size was too small. C. they were not a stratified survey. D. the sampling proportion was too small. E. of non-response bias.
Solve and check your answer.7x - 8x = 15
A. 15 B. 0 C. -15 D. -1
Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 32 watches B. 65 watches C. 45 watches D. 40 watches
Find all saddle points for the matrix game.
A. Entry a23 and entry a33 B. Entry a23 C. Entry a13 D. No saddle points