If you are just dividing percent's, then each grade would have 12.5 percent.
They would be 20, 21, 22, 23, and 24
48 is the greatest common factor
Hip Breadths and Aircraft Seats
Engineers want to design seats in commercial aircraft so that they are wide enough to fit 98% of all males. (Accommodating 100% of males would be too expensive.) Men have hip breadths that are normally distributed with a mean of 14.4 in. and a standard deviation of 1.0 in. Find P 98. That is, find the hip breadth for men that separates the smallest 98% from the largest 2%.
5x^2 - 24x + 8 is your answer to this equation
