Work out the length x 14cm 7cm

What is the smallest integer n such that n\sqrt{2} is greater than 20

S-7< 3 i need answering this problem someone asap answer

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.