What is the ratio between $12 each and sells them for $15 each what is the percent 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?

How do you find the area of a triangle

Common binomial factor of 6x(3x+7)+5(3x+7)