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John davis, a manager at a supermarket, wants to estimate the proportion of the customers that will be using food stamps at his store. How large a sample is requested to estimate the true proportion with 5% with 95% confidence level?
the base of a solid is an ellipse whose major axis and minor axis are 12 and 8cm long, respectively. what is the volume of the solid if every section perpendicular to the major axis is an is an equilateral triangle.
Explain how you decide whether it is easier to solve a system by substitution or the elimination method. Response should be detailed and include an example
Ken borrowed $6,000 for 4 years at a rate of 7% simple interest per year. How much interest will Ken have to pay after paying back the borrowed amount?
in a sample of 3980 pregnant women who were exposed to DES before giving birth, 63 developed tissue abnormalitites. Calculate the approximate number of of women per thousand who were found to have thee abnomality.
A tank in the shape of an inverted right circular cone has height 9 meters and radius 13 meters. It is filled with 6 meters of hot chocolate.
If many samples of size 15 (that is, each sample consists of 15 items) were taken from a large normal population with a mean of 18 and variance of 5, what would be the mean, variance, standard deviation and shape of the distribution of sample mean..
Find the probability that during any given day three machines will break down.
use a combinatorial proof to show the summation of k=0 to the P elements- (n/p) (m/[p-k])=([n+m]/p)
Suppose that you select 2 cards without replacement from an ordinary deck of playing cards. If the first card that you select is a king, what is the probability that the second card that you select is a heart?
Use the Poisson model to approximate the probability. Round your answer to four decimal places.
Framing algebraic equations
A bookstore sells a total $4500 worth of math books, $3000 worth of science books, and $1200 worth of history books. the book store also sells several other types of books. the total sales are $11,000.
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