To model the total amount of water \( w \) that Martina used in her project, you can set up the equation based on the number of containers and the amount of water in each container.
Martina has 5 containers, and she used 8.5 ounces of water in each one. Therefore, the total amount of water \( w \) can be calculated as:
\[ w = \text{(number of containers)} \times \text{(amount of water per container)} \]
This can be written as:
\[ w = 5 \times 8.5 \]
To make it fit your request for an equation format \( w/?=? \), we can express it as:
\[ w/1 = 5 \times 8.5 \]
Thus:
\[ w/1 = 42.5 \]
So, the complete equation is:
\[ w/1 = 42.5 \]
In this case, \( w = 42.5 \) ounces, as that is the total amount of water used.