Solution: If an object has a density of 8.65 g/cm3, what is its density in units of kg/m3? (i) 8.65 x 103 kg/m3 (ii) 8.65 x 10-3 kg/m3 (iii) 8.65 x 101 kg/m3 (iv) 8.65 x 10-1 kg/m3 (v) 8.65 x 10-7 kg/m3 If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd) (i) 2.3 gallons (ii) 47 gallons (iii) 24 gallons (iv) 21 gallons (v) 7.1 gallons