A mouse has a mass of 18 g. A guinea pig has a mass of 0.85 kg. Is the mass of the two animals together greater or less than 1 kg? And why?

Isn't the mouse mass .018kg?

If the mouse weighs 0.018 kg (18 g), and the guinea pig weighs 0.85, they both add up to weigh 0.868 kg, which is less than 1 kg.

To determine whether the mass of the two animals together is greater or less than 1 kg, you need to add the individual masses of the mouse and the guinea pig.

First, let's convert the mass of the mouse from grams to kilograms:
18 grams = 18/1000 = 0.018 kg

Now we can calculate the total mass of both animals:
Total mass = Mass of mouse + Mass of guinea pig
Total mass = 0.018 kg + 0.85 kg

By adding the masses, we find that the total mass is:
Total mass = 0.018 kg + 0.85 kg = 0.868 kg

Therefore, the mass of the two animals together is less than 1 kg (0.868 kg).