0.8 m^3 of water (assume density of water = 1,000 kg/m^3)are mixed with 1.4m^3of liquid of relative density 0.83. What is the density of the mixture if there is no change in total
volume on mixing?

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

B.the point lies directly on the regression

The correct answer is 7