What would be the answer??

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?

Ineed to know how to write question one in mathematical terms

What is the hypotenuse of a triangle with 4 ft and 5 ft