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A 20330 cubic foot room initially has a radon level of 855 picocuries per cubic foot. A ventilation system is installed that brings in 380 cubic feet of air per hour that contains 6 picocuries per cubic foot, while an equal quantity of the well-mixed air in the room leaves the room each hour. Setup and use a differential equation to determine how long it will take for the room to reach a safe to breathe level of 111picocuries per cubic foot.
Assume that my lawn is encroaching my garden and reduces my space on average by 8% each year. Approximately how many years before the garden space has been cut in half? Answer = 8.8 70/8=8.75 round up t
Equipment was purchased for $46,000 with an estimated life of five years and residual value is estimated at $2,000.
Problem: In a chemical reaction, a compound X is formed two compounds Y and Z. The masses in grams of X, Y and Z present at time t seconds after the start of the reaction are x, 10 - x and 20 - x respectively.
Choose one computer of interest to you and review the product description and features list. Post the sales web link to your chosen computer.
An apartment building has seven elevators. Each elevator stops on at most six floors. You can get to any one flooor from any other floor without changing elevators (if you take the right elevator). What is the largest number of floors that buildin..
Verify the Gauss' Divergence Theorem and Calculate the single, double and line integral - MATH2000 Find the surface area of S.
A printing press has a roller 13 inches in diameter. The speed of a point on the roller's surface moves at 94 feet per second. What is the roller's angular speed?
The following Minitab output is based on the responses of 35 students randomly selected from ALL sections of Stat 200 to the question "Do you smoke cigarettes?"
Find the general solution for system of equations with respect to the basic matrix B = (-a1 -a2 -a4), where -ai represents the ith, column of A.
A manufacturer of lighting fixtures has daily production costs of C= 800-10x+0.25x^2, where C is the total cost (in dollars) and x is the number of units produced. How many fixtures should be produced each day to yield a minimum cost? What is the ..
Mr. Ryerson, the owner of an organic fish store determined that the average weight for a catfish is 3.2 pounds with a standard deviation of 0.8 pound.
You are the manufacturer of a product that gives guarantees against failure. What is the expected amount of reimbursement that the insurer will pay each month?
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