Amr asaad, sentences begin with capital letters at all times.
30 minutes; [$4.00; $7.00; $9.00, this is how we write our currency in the United State.
The taxi costs between $7.00 and $9.00, but the bus costs just $4.00.
Keep trying with your assignments if you practice the small hints that I send you , you will go very far with your English. Do not forget to start each sentence with a capital letter, Ok?
Thank you very much,