To find out how many blocks Zoe placed on the scale, we can use the equation:
\[ \text{Total weight} = \text{Number of blocks} \times \text{Weight per block} \]
Let \( x \) be the number of blocks. The weight per block is 0.6 ounces and the total weight is 14.4 ounces. We can set up the equation as follows:
\[ 14.4 = x \times 0.6 \]
Now, we can solve for \( x \):
\[ x = \frac{14.4}{0.6} \]
Calculating the right side:
\[ x = 24 \]
Therefore, Zoe placed 24 blocks on the scale.