Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 3, Problem 3.6P
To determine
The plot of percent of properly disposed items versus the number of receptacles and discuss the results.
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- The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if its 5076 households discard waste with weights having a mean that exceeds 26.49 lb/wk. For many different weeks, it is found that the samples of 5076 households have weights that are normally distributed with a mean of 26.22 lb and a standard deviation of 12.65 lb.What is the proportion of weeks in which the waste disposal facility is overloaded?P(M > 26.49) = Enter your answer as a number accurate to 4 decimal places. NOTE: Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.Is this an acceptable level, or should action be taken to correct a problem of an overloaded system? No, this is not an acceptable level because it is not unusual for the system to be overloaded. Yes, this is an acceptable level because it is unusual for the system to be overloaded.arrow_forward3. Two machines are used for filling plastic bottles with a net volume of 16.0 ounces. The fill volume can be assumed normal, with standard deviation σ1 = 0.020 and σ2 = 0.025 ounces. A member of the quality engineering staff suspects that both machines fill to the same mean net volume, whether or not this volume is 16.0 ounces. A random sample of 10 bottles is taken from the output of each machine. Please show complete solution.arrow_forwardConsider a rectangular wastewater treatment pond having a length of 100 ft,width of 20 ft, and depth of 20 ft. Assume the discharge from a wastewater treatment plant has aflow of 30 MGD with a solids concentration of 5 mg/L.a) Determine the mass flow rate of solids discharged in ton per day?b) Calculate the residence time of the pond in minutes?arrow_forward
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