Plastic toy with a mass of 18 grams occupies 9.0cm3 of space its density is a) 0.3 g/cm3 b) 1.5 g/cm3 c) 2.0 g/cm3 d) 6.0 g/cm3

c) 2.0 g/cm³

Step-by-step explanation:

The units of density (g/cm³) tell you to divide the mass by the volume.

... (18 g)/(9.0 cm³) = (18/9.0) g/cm² = 2.0 g/cm³

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.