We use the notation |-2| to say “the absolute value of -2,” which means “the distance of -2 from 0 on the number line” What does |-7| mean and what is its value? What does |1.8| mean and what is its value?

15 point ! ~ see if you know the answer to both you!

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.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.