A laptop store bought a program at a cost of $160. They sold it at a selling price of $195. What is the percent of markup?

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

One positive number is 9 more than twice another. if their product is 95, find the numbers

Which number completes the inequality? 2/3 < _ < 7/9