Give the answer in fraction form please.
1.64- [-2 3/4]

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.

100 points, hi, i’m not sure how to get the equation from the graph and table.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?