A normal distribution has a mean of 18 and a standard deviation of 5. Solve the following problems: (a) Between what two scores x and y (x a1) what is the value of x?
a2) what is the value of y?
(b) What percentage of scores fall between ten and thirty?
(c) Below what score did 20% of the results fall?
(d) What percentage of scores are above 25?

Write an algebraic expression for the word expression the quotient of c and 8

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

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?