Answer:
First option: True.
Step-by-step explanation:
To know if the volume of this rectangular prism is 378 m³, you need to use the formula for calculate the volume of a rectangular prism:
Where "l" is the lenght, "w" is the width and "h" is the height.
You know that that this rectangular prism measures 7 meters long, 9 meters wide, and 6 meters high, then you can substitute these values into the formula.
Therefore, the volume of the rectangular prism is:
Then the answer is: True.