Determine the values of m and n for which the function f(x)= mx^4 + nx^3 + 68x^2-x-6 gives a remainder of zero when divided by (2x+1) and (4x-1). Explain your process.

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.