What is the length (magnitude) of vector (-4,2)

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

What is the value of x in the following equation? -3x-2=2x+8

Which of these tools or constructions is used to inscribe a hexagon inside a circle?