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Find a formula for the general term an of the sequence, assuming that the pattern of the first few terms continues.
{-1/4, 2/9, -3/16, 4/25,......}
What type of sampling? the population consists of all 250 students in your large statistics class. You plan to obain a simple random sample of 30 students by using the sampling frame of students present next monday.
What is the composition in mole fractions of a solution that has a vapor pressure of 37 torr at 20 ^circ {rm C}?
Evaluate the line integral, where C is the given curve. (Round your answer to one decimal place.)
A particular test for the presence of steroids is to be used after a professional track meet. If steroids are present, the test will accurately indicate this 95% of the time.
Use mathematical induction to prove that 2-2*7+2*7^2-.....+2(-7)^n=(1-(-7)^n+1)/4 whenever n is a nonnegative integer. Show that 1^3+2^2+....n^3=[n(n+1)/2]^2 whenever n is a positive integer.
From the following augmented matrix, first write the system of equations that represents the augmented matrix and then create a real-world word problem that would represent these equations and their unknowns.
Find all of number for which the rational expression: (x+4) / (x^2 - 3x -10), is not defined. Explain your answer and add explanatory text for each line of algebra. What role does the numerator play and why?
A boat's crew rowed 12 miles downstream, with the current, in 1.5 hours. The return trip upstream, against the current, covered the same distance, but took 4 hours. Find the crew's rowing rate in still water and the rate of the current.
It is known that 20% of old cars cannot pass the emission test . Four old cars are selected randomly . x is the number of card in the sample that cannot pass the emission test.
a team of clothing workers had an output of 1000 uniforms per week. This output was increased by 20%, which demanded and increase of 50 uniforms per worker. How many workers are there? show your work.
Find coordinate of centroid using multiple integral method -Determine the z-coordinate of the centroid of G.
The general manager of a construction company compiled the ages of 50 newly hired unskilled employees. The data is shown, what is the median age.
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