The density of glycerin is 1.26 g/cm3. how many pounds/foot3 is this ? use the conversion rates of 454g/1 pound and 28,317cm3/1foot3 express your answer to the correct number of significant figures

78.6 lb/ft³  

Step-by-step explanation:

Let's do this in steps.

1. Convert grams to pounds

D = (1.26 g/1 cm³) × (1 lb/454 g)

   = 2.775 × 10⁻³ lb/cm³

2. Convert cubic centimetres to cubic feet

D = (2.775 × 10⁻³ lb/1 cm³) × (28 317cm³/1 ft³)

   = 78.6 lb/ft³

first one is the correct answer