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What is the smallest integer n such that n\sqrt{2} is greater than 20

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

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.