If you have two drums and for flutes write each ratio as a fraction in simplest form

What is the exact volume of the cylinder 1.5 m 2.5 m

1. what are the missing reasons in the proof 2. it's in the second picture and 3

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.