To find the total volume of \( 1.5 \times 10^6 \) sugar cubes, each with a volume of 4.9 ml, you can multiply the number of sugar cubes by the volume of one sugar cube:
\[ \text{Total Volume} = \text{Number of Sugar Cubes} \times \text{Volume of One Sugar Cube} \]
Substituting the values,
\[ \text{Total Volume} = 1.5 \times 10^6 \times 4.9 , \text{ml} \]
Now, performing the multiplication:
\[ 1.5 \times 4.9 = 7.35 \]
Therefore, we can express the total volume as:
\[ \text{Total Volume} = 7.35 \times 10^6 , \text{ml} \]
So, the total volume of \( 1.5 \times 10^6 \) sugar cubes is \( 7.35 \times 10^6 \) ml.