Final answer:
The density of a substance can be calculated by dividing its mass by its volume. Rounding the calculated density to a specific number of decimal places can give you a desired value. Dividing with a calculator is the correct approach, and rounding can help achieve a specific number of decimal places.
Step-by-step explanation:
The density of a substance can be calculated by dividing its mass by its volume. For example, if you have a mass of 37.46 grams and a volume of 12.7 cm³, dividing the mass by the volume will give you a value of approximately 2.95 grams per cubic centimeter.
If you want to round the calculated density to a specific number of decimal places, you can use rounding. To make it approximately 1.3, you would round the calculated density to one decimal place.
Dividing with a calculator like you mentioned is the correct approach. The long decimal values you see are just the result of a more precise calculation. If you're looking for a specific number of decimal places, you can round it as explained above.