Dexter sees a jacket that has a regular price of $69.99. He decides to purchase the jacket and gets a 20% discount. How much does Dexter have to pay if there is a sales tax of 8%?

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 range? can’t seem to find it out

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great