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A research firm conducted a survey to determine the mean amount people spend at a popular coffee shop during a week. They found the amounts spent per week followed a normal distribution with a population standard deviation of $4. A sample of 49 customers revealed that the mean is $25. What is the 95 percent confidence interval estimate of μ?
Fixed costs are estimated to be $8,400 for 2005. How many units should the company sell to break even ?
Let X be the number of random numbers selected from {0,1,2,...,9} independently until 0 is chosen. Find the probability mass functions of X and Y = 2X + 1.
Prepare the name of congruent angles from the given figure - Name every angle that is congruent to (has the same measure as) angle ACD.
If local mortgage rates are 8.5%/year compounded monthly for a conventional 30-yr mortgage, what is the price range of houses they should consider? (Round your answers to the nearest cent.)
farmer wants to fence an area of 13.5 million square feet in a rectangular field and then divide it in half with a fence parallel to one of the sides of the rectangle. What should the lengths of the sides of the rectangular field be so as to minim..
Fundraising. The St. Mark's community Barbecue served 250 dinners. A child's plate cost $3.50 and an adult's plate cost $7.00. A total of $1347.50 was collected. How many of each type of plate was served?
Write down a polynomial in one variable x such that the coefficient of x^n is the number of ways to choose a snack with n pieces of fruit.
Consider two cases: one in which the ball is not completely submerged and the other in which it is.
At what time is the growth rate of 20 new bacteria per minute and how many bacteria are there at this time in the bacterial culture?
When the total area of the disturbed water is square feet, at what rate is the total area of the disturbed water changing?
What is the limit definition of derivative? How can we use it to find a derivative?
Use this information to construct a 98% confidence interval to estimate the mean number of pages for the population of medium-sized company policy books.
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