Final answer:
To calculate the mass, multiply the dimensions of the object by the density and round to 2 decimal places.
The mass is approximately 137.09 g.
Step-by-step explanation:
To calculate the mass, we need to multiply the dimensions of the object by the density.
Using the provided values, we have:
Mass = 5.4 cm × 3.2 cm × 7.1 cm × 1.2 g/cm³
Mass = 128.448 g/cm³
Rounded to 2 decimal places, the mass is approximately 137.09 g.