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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?
How long will the ball take to reach its maximum height? How long will it take the ball to hit the ground?
the function defined by s(t)= 576+144t-16t2 describes the heigh, in feet, of a rock t seconds after it has been thrown upward at 144 feet per second from the top of a 50-story building.
If no two strings in a code differ in fewer than three positions, the we can actually correct a single error, by finding the unique string in the code that differs from the received string in only one position.
Probability Based on Random Selection, One box is chosen at random and a drawer is opened from that box. If it contains a gold coin, find the probability that it is in Box I.
a test has twenty questions worth 100 points. The test consists of True/False questions worth 3 pointS each and multiple choice questions wrth 11 points. How many multiple choice questions are on the test? Solve algebraically.
Let R be the shaded region bounded by the graphs of y=sqaure root of x, and y=e to the power of -3x, and the vertical line x=1.
Write your suggestions to help a fellow student succeed in this course using short sentences, and arrange them in decreasing order from greatest to least important.
If a system of m linear equations in four unknowns has a unique solution, then m must be greater than or equal to four. If a system of m linear equations in four unknowns has no solutions, then m must be greater than or equal to four.
(a) what is the probability that the total life of both batteries will exceed 760 hours? (b) what is the probability that the second battery will outlive the first by at least 25 hours?
Find the probability that they will have a rating between 230 and 260
Solve using the five-step problem-solving process. Show all steps necessary to arrive at your solution. If an object is propelled upward from ground level with an initial velocity of 92.5 feet per second, its height h in feet t seconds later
You have 80m of fence to enclose a rectangular area for a snow sculpture competition. one side of the area is bound by the school, so the fence is required for only three sides of the rectangle.
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