Which of the following english phrases represent the expresstion 46(35+84)?
1. forty-six added to eighty-four times thirty-five
2. forty-six times thirty-five plus eighty-four
3. The sum of thirty-five and eighty-four multiplied by forty-six
4. forty-six times the sum of thirty-five and eighty-four

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.