29.8 ÷ 3 is 9.9333 repeating
You can buy 5 bottles because $4 times 5 equals $20. I hope this helps :)
The answer is Johnny. You can conclude from the first sentence of your question. It is stating that Johnny's mother has three children. Johnny is included in the three children. So, the third child's name was Johnny!
Thank you! :D
