Solve for a side in right triangles! PLS HELP

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

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?

10% of 1,900,000. show me how you got the answer