Abigail orders a book and
two identical DVDs from
Amazon. The total bill is
$42.95. If...
Mathematics, 14.01.2021 19:10 rudolph34
Abigail orders a book and
two identical DVDs from
Amazon. The total bill is
$42.95. If the book
costs $7.65, then how
much does each DVD
cost?
Answers: 3
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Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?
Answers: 3
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If square root x = -7, then x= -49 true or false
Answers: 1
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Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?
Answers: 3
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