Solve the problem.39% of a store's computers come from factory A and the remainder come from factory B. 2% of computers from factory A are defective while 3% of computers from factory B are defective. If one of the store's computers is selected at random, what is the probability that it is defective and from factory B?
A. 0.64
B. 0.03
C. 0.018
D. 0.012
Answer: C
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Evaluate the integral.
A. - 
cos 9x - 5x sin 9x + C
B. - 
cos 9x - 
x sin 9x + C
C. - 
cos 9x - 
x sin 5x + C
D. - 
cos 9x - 
sin 9x + C
Solve.A certain store has a fax machine available for use by its customers. The store charges $2.10 to send the first page and $0.60 for each subsequent page. Use an inequality to find the maximum number of pages that can be faxed for $6.90
A. at most 50 pages B. at most 9 pages C. at most 3 pages D. at most 12 pages
The matrix is the final matrix form for a system of two linear equations in variables x1 and x2. Write the Solution of the system.
A. x1 = 3 x2 = 5 B. x1 = -5 x2 = -3 C. x1 = 5 x2 = t for any real number t D. x1 = 5 x2 = 3
Find the eccentricity of the ellipse or hyperbola.x2 + 25y2 = 25
A. 
B. 
C. 2
D. 