Final answer:
The value of one right in the rights offering is $5.20.
Step-by-step explanation:
The value of one right is determined by the difference between the subscription price and the market price of the stock. In this case, the subscription price is $20 per share and the market price is $25.20 per share. Therefore, the value of one right is $25.20 - $20 = $5.20. The stockholders will receive one right for each share they own, so the total value of the rights offering is $5.20 per share.