)the elevation of city a is 60 feet above sea level; the elevation of city c is 12 feet above sea level. the elevation of city d is 1 over 2 of the elevation of city c.
part a: write an expression to represent the elevation, in feet, of city d. (5 points)
part b: solve the expression and explain why the answer is negative or positive. (5 points)

Elevation of city D is half the elevation of city C, It is given that the evelation of city C is 12 feet above the sea level level. Hence elevation of city D=12/2=6feet above the sea level. This is the answer to part A The elevation of city D=x/2, where x is the elevation of city C in feet. For part B write, here x=12 hence x/2=6 Therefore the elevation of city D is 6feet above the sea level.
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Therefore the election of city D is 6ft above the sea level.

The density of the cube is 40