A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is
18
π
18π18, pi meters.
What is the area
A
AA of the cross section of the column?
Give your answer in terms of pi.

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

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?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)