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Sunshine Stereo sells cd players. The cd players life is normally distributed with a mean of 2.3 years and a standard deviation of 0.4 years. What is the probability that a cd player will break down during the guarantee period of 2 years? (Hint: the statement that the cd player breaks during the 2-year guarantee period means the life is less than 2 years, or x<2. Now find the z score).
Use the method of undetermined coefficients to find one solution
The shortlist consists of 7 men and 3 women. Because all the shortlisted applicants are considered to be equally qualified, the names of two of them are drawnn, one after the other at random, to be called for an interview.
Let D be a Euclidean ring, F its field of quotients. Prove the Gauss lemma for polynomials with coefficients in D factored as product of polynomials with coefficients in F.
For a class of 43 students, for a certain exam, the mean grade is 67 and the standard deviation is 7, how many students should receive a C?
When a student is taught how to find the mean of a set of data, why might the child have a difficult time accepting the answer? Please explain in details and give example.
Van Gogh's painting Starry Night measures 92 cm long by 73 cm high. You buy a poster that shows an enlargement of the painting. The poster measures 120 cm long by 100 cm high. Is the poster an accurate representation of the painting?Hint: Is the p..
how many cups of flour should Susan use In her grandmother's recipe? solve & explain how you use the meanings of multiplication aSusan has a 5-pound bag of flour and an old recipe of her grandmother's calling for 1 kilogram of flour. she read on th..
John has 11 more chocolate bars than Rick. Cathy has 8 times as many chocolate bars as John. If Rick has r chocolate bars, which expression below represents how many chocolate bars Cathy has, c?
Decompose 6i-3j-6k into vectors parallel and perpendicular to following vectors.
The length of a rope required to wrap around a circular wheel exactly is 8.8cm. What is the diameter of the wheel to the nearest tenth?
Solve equations and systems of equations in two variables, formulate real-world problems in terms of linear equations and solve these systems by several commonly applied methods.
every day 124,000,000,000 spam emails are sent if each email wates 4 secounds, how many hours are wasted each day due to spam? how many days? how many years?
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