A college bookstore has two identical mathematics texts, three identical physics texts, four identical computer science texts, and two identical psychology texts in a row on a shelf. If a student knocks them all on the ground and then hurriedly places them all back on the shelf with no attention to their original order, in how many ways can he replace the texts on the shelf?

The average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction work force after he graduates in 2012. his friend tells him that average hourly earnings for construction workers will rise by 2% from 2009 to 2012. based on the data below, assuming that the projected hourly earnings are correct, is jason’s friend’s statement accurate? construction industry - average hourly earnings, 2000-2009 a. his friend’s statement is accurate. the average hourly earnings will increase by 2%. b. his friend’s statement is not accurate. the percent increase will be more than 2% c. his friend’s statement is not accurate. the percent increase will be less than 2% d. his friend’s statement is not accurate. the average hourly earnings will decrease

What is the difference between regular convex and concave polygons

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4