Points points points point

Which expresions are equivalent to the one below? check all that apply. 5x

4+6x-3x^3 in standard form with explanations because i don’t understand

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.