Explain why the triangles are similar. Then find the vaule of x

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?

Multiply. write your answer in simplest form. 3/8 x 5/7

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?