From 1975 to 2005, the annual cigarette consumption in the US dropped
from 4,125 per person ta 1,890 per
person Find the percent of decrease.

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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.

What is 1.5% of 120 or what number is 1.5% of 120