Answer:
The equation that shows that is the division between 4 and 0.5 as:

Step-by-step explanation:
First, it is necessary to know that one half foot is equivalent to 0.5 foot.
We can solve this using a rule of three in which we know that 1 piece has one half foot long, then 4 foot long how many pieces have. This is:
1 board ----------- 0.5 foot
X ------------ 4 foot
Where X is the number of pieces that he can get from a four foot long board.
Solving for X, we get:

So, the equation that shows how many one half foot pieces he can get from a four foot long board is:
