Trigonometric function intervals decreasing

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents