Courtney is building a rectangular wading pool. she wants the area of the bottom to be 54 ft square feet. she also wants the length of the pool to be 3 feet longer than twice the width. what are the dimensions of the pool?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.