If b is the reference angle

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?

What is the range for 31,39,29,34,37,24,36,33,34,28