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a computer store has 75 printers of which 20 are laser printers annd 55 are ink jet printers. if a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.
It randomly samples 100 of its alumni. The mean annual income was $59,000 with a standard deviation of $1,600. Find a 95% confidence interval for the true mean annual income of the nursing school alumni. Write a statement about the confidence leve..
Use Cramer's rule to find the market equilibrium prices for each of these goods. Please show step by step.
a piece of wire is 38 inches long. the wire is cut into two pieces; then each piece is bent to form a square. Find the length of each piece if three times the area of the larger square exceeds the area of the smaller square by 95.75 square inches.
Verify Stoke's theorem where S is the surface of the paraboloid 2z=x2 + y bounded by z=2 and C is its boundary.
Find a cubic function y=ax^3+bx^2+cx+d whose graph has horizontal tangents at the points (-2,6) and (2,0).
What is the value of an annuity at the end of 5 years if $125 is deposited monthly into an account that pays 8% compounded monthly? Calculate the amount of interest earned.
Important information about Find the probabilities, Suppose a family plans 6 children, and the probability that a particular child is a girl is ½.
Standard normal probabilities. According to an article in The New York Times, 19.3% of New York City adults smoked in 2003. Suppose that a survey is conducted this year.
Find the equation of the line and you can write your answer in the following form: p = mx + b. Normally in this class, you would probably use the "y = mx + b" format. You are basically substituting the variable "y" with "p"
Let A be the area of a circle with radius r that is increasing in size with respect to time. If the rate of change of the area is 12 cm/s, find the rate of change of the radius when the radius is 18cm.
You purchase shares of a technology company and hold them for one yer. During that time the price pershare ranges from $64 to $143. Write an absolute value inequaity to represent the stock prices for that years.
how many of each should she order to maximize her profit if she can spend 1200 on buying costs 800 on selling cost and 500 on delivery costs?
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