Final answer:
The density of a potato with a volume of 800 cm³ and a mass of 400 g is calculated using the formula density = mass/volume, resulting in a density of 0.5 g/cm³.
Step-by-step explanation:
To calculate the density of a potato with a volume of 800 cubic centimeters and a mass of 400 grams, we will use the formula for density: density = mass/volume. In this case, the mass of the potato is 400 g and the volume is 800 cm³. So, the density (d) would be d = 400 g / 800 cm³.
Performing the calculation, we get d = 0.5 g/cm³. Therefore, the answer is (a) 0.5 g/cm³, which can be rounded to the tenth place as requested.