What is he sum of 7 2x6+4 7x6

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.

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28