Use = or ? for ? to write a true sentence.
? 
A. ?
B. =
Answer: A
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Find all numbers a such that the given point is on the circle x2 + y2 = 1.
A. a = ± 
B. a = ± 
C. a = ± 
D. a = ± 
Without actually converting, choose the most reasonable answer.The weight of a vitamin is about __________ .
A. 200 g B. 200 kg C. 20 kg D. 2 kg
Find 
by solving the initial value problem.
?
; 
What will be an ideal response?
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