Round each number to the nearest hundredth. what is the best estimate for the sum of 12.547 + 83.919?

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.

If you answer 2+2 you will get over 80 points

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry