Ashley one 129 pieces of gum playing our county fair at school she gave every student in her math class four pieces she has nine remaining how many students are in her class

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)