Which statements about the function f(x) = (x + 4)(x – 6) are true?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Can someone explain to me how to do

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?