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The air in a room with volume 180 m3 contains 0.35% carbon dioxide initially. Fresher air with only 0.05% carbon dioxide flows into the room at a rate of 2 m3/min and the mixed air flows out at the same rate.Find the percentage of carbon dioxide in the room as a function of time t (in minutes).
What happens with the percentage of carbon dioxide in the room in the long run?
Jen invested a total of 500 dollars, part of it at 9 percent interest and the rest at 10 percent. If 48 dollars was earned from the investment, how much money was invested?
The number of workers in the U. S. increased from 41.3 million to 44.4 million. What is the percent increase? Employees working from home increased from 23.5 million to 24.1 million. What is the percent increase.
1-in the liquid limit test the moisture content corresponds to 20 25 amp 35. and the blows are 35 2 amp 15. what is the
Simulation of an expectation. Design a simulation exercise in R to approximate the value of E ( X^X) when X has a U [0,1] distribution. Plot the value of the approximation as the sample size goes from 1 to 10,000
The length of a new rectangular playing field is 7 yards longer than tripple the width. If the perimeter of the rectanglar playing field is 464 yards
Prepare a report for Karen that summarizes your findings, forecasts, and recommendations. Include.
throughout the 1990s the average household expenditure on scratch tickets in a state has been 5. in 2010 a sample of 7
A boat can travel 46 mph in still water. If it travels 270 miles with the current in the same length of time it travels 190 miles against the current, what is the speed of the current?
Beth, Bill, and Eddie together work 6 hours. Then, Bill and Eddie do it in 9. Beth, Bill, and Eddie work 3 hours together. Beth and Bill spent 6 hours more. How long would it take Beth to do the house by herself? Eddie to do the house by herself? ..
Janice bought 30 items each priced at 30 cents, 2 dollars or 3 dollars. If her total purchase price was $30.00, how many 30-cent items did she purchase?
What was the initial size of the culture?
Suppose that (a_n) ^ infinity, n=m is a convergent sequence of real numbers. Then (a_n) ^ infinity, n=m is also a Cauchy sequence
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