Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 
C. 
D. 
Answer: C
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Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275 B. 0.22 C. 0.5667 D. 0.7083
Find a cubic function with the given zeros.7, -3, 2
A. f(x) = x3 - 6x2 - 13x - 42 B. f(x) = x3 - 6x2 - 13x + 42 C. f(x) = x3 + 6x2 - 13 + 42 D. f(x) = x3 - 6x2 + 13x + 42
Combine like terms. Write the answer in descending order.82.4x2 - 42.4x + 59.4 + 57.6x - 61.4x2 - 29.4
A. 21x2 + 15.2x + 30 B. 143.8x2 + 100x + 88.8 C. 21x2 + 100x + 88.8 D. 21x2 - 15.2x - 30
Solve the problem.A swimming pool has a leak, and the leak is getting worse. The table below gives the leakage rate every 6 hours. Use right endpoints to estimate the number of gallons lost in 48 hours.
A. 32.5 gal B. 195 gal C. 145.2 gal D. 255 gal