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Machine A can do a piece of work in 8 hours while machine B can do the same piece of work in 10 hours. The two machines were set to do the work together but after 2 ½ hours B broke down leaving A alone to complete the rest of the work. How long did it take machine A to do the remaining work.
suppose we draw two tickets from a hat that contains tickets numbered 1234. let x be the 1st number drawn and y be the
Find the roots of the quadratic equation:z^2-4z-12=0. (If there is more than one root, separate them with commas.)
You operate a delivery service in your local area, but you are thinking of expanding to another market. You're concerned that you might need to set different prices in the new market because the cost of gas might be much different.
What is the critical F value for a sample of four observations in the numerator and seven in the denominator? Use a one-tailed test and the .01 significance level.
A behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation.
you work for the bc lottery corp. your boss asks you for an estimate of the percent of british columbians who have
fitting of simple linear regression equation.given the student population for a school district over the past few years
The U.S.Census Bureau announced that the median sales price of new homes sold i April 2009 was $221,660, and the mean sales price waas $274,300. Assume that the standard deviation of the prices is $90,000.
sccoast an internet provider developed the following frequency distribution on the age of internet users. find the mean
one test that people who wish to donate blood must undergo is a test of iron level. individuals with insuficient iron
We want to have a velocity error constant of Kv - 20. We also want to have a phase margin of approximately 45° and a closed-loop bandwidth greater than ω= 4 rad/s. Use two identical cascaded phase-lead networks to compensate the system.
a sample of n 8 scores has a mean of m 12. one new score is added to the sample and the new mean is found to be m 13.
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