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
Answer: B
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Solve the problem.Find the work done in winding up a 175-ft cable that weighs 4.00 lb/ft.
A. 61,300 ft?lb B. 15,300 ft?lb C. 184,000 ft?lb D. 1400 ft?lb
Solve the problem.Suppose the price p of bolts is related to the quantity q that is demanded by: p = 500 - 5q2where q is measured in hundreds of bolts. Suppose the supply function for bolts is given by p = 5q2, where q is the number of bolts (in hundreds) that are supplied at price p. Find the equilibrium supply.
A. About 636 bolts B. About 778 bolts C. About 707 bolts D. About 7 bolts
Apply the distributive property.-9x(8x2 + 10x + 7)
A. -72x3 - 90x - 63 B. -72x3 - 90x2 - 63x C. -72x2 - 90x - 63 D. 72x3 + 90x2 + 63x
Write a matrix equation equivalent to the system of equations. x + y + z = -4 4x - 4y - 3z = -4-4x - 3y - 2z = 4
A. 
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B. 
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C. 
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D. 
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