Final answer:
To calculate how much money Natalia spent after using five-ninths of her money and having [tex]$728 left, determine her initial amount by multiplying $[/tex]728 by 9/4 and then subtract the remaining amount to find how much she spent.
Explanation:
To find out how much money Natalia spent after using five-ninths of her money and having [tex]$728 left, we first need to determine what one-ninth of her money is. If 5/9 were used, Natalia spent 4/9 of her money. We do this by multiplying $[/tex]728 by 9/4 to get the total amount she had initially, which is [tex]$1632. Now, subtract $[/tex]728 from [tex]$1632 to find how much she spent, which is $[/tex]904.
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