Answer:
![(A)5+2.75S\leqslant21](https://img.qammunity.org/2023/formulas/mathematics/college/eo3oxrrcq0jbx8eiltnni2ndjc4bqvc6h8.png)
Step-by-step explanation:
The price of a train ticket consists of an initial fee of $5 plus a fee of $2.75 per stop.
Let S represent the number of stops that Julia buys.
Therefore, the price of S stops will be:
![5+2.75\cdot S](https://img.qammunity.org/2023/formulas/mathematics/college/sww0k8gy0gln4gurmy7qqfmdgylgbr6op2.png)
Since Julia has $21, it means the total cost of her ticket must either be less than or equal to $21.
Therefore, the inequality which describes this scenario will be:
![5+2.75S\leqslant21](https://img.qammunity.org/2023/formulas/mathematics/college/ipli7u4prdzs8wgx221z24z5z0npul4wie.png)
The correct option is A.