To find the total volume of \( 1.5 \times 10^6 \) sugar cubes, you can multiply the number of sugar cubes by the volume of one sugar cube.
Given:
- Volume of one sugar cube = 4.9 ml
- Number of sugar cubes = \( 1.5 \times 10^6 \)
Now calculate the total volume:
\[ \text{Total Volume} = \text{Number of sugar cubes} \times \text{Volume of one sugar cube} \] \[ \text{Total Volume} = (1.5 \times 10^6) \times 4.9 \]
Calculating \( 1.5 \times 4.9 \):
\[ 1.5 \times 4.9 = 7.35 \]
Then, include the power of ten:
\[ \text{Total Volume} = 7.35 \times 10^6 \text{ ml} \]
Thus, the total volume of 1.5 million sugar cubes is:
\[ \boxed{7.35 \times 10^6 \text{ ml}} \]