WHAT DOES AN ANIMAL BREEDER DO I LITERALLY NEED HELP ON THIS ONE!!

Some school commercial thingy.

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.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Which statement about the annual percentage rate (apr) is not true?