Simplify.
A. 
B. 17
C. - 
D. 
Answer: A
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Solve the problem.A square plywood platform has a perimeter which is 6 times the length of a side, decreased by 8. Find the length of a side.
A. 2 B. 4 C. 6 D. 1
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Bob's grocery bill was $8.72. He gave the clerk a $20 bill. How much change should he receive?
A. Estimate: $11; exact: $10.28 B. Estimate: $9; exact: $8.72 C. Estimate: $11; exact: $11.28 D. Estimate: $11; exact: $11.27
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856
Write in standard form the equation of the ellipse with the given characteristics.center at the origin, an x-intercept at (4, 0), and a y-intercept at (0, 
)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1