The elevation of city a is 96 feet below sea level; the elevation of city c is 24 feet below sea level. the elevation of city d is 1 over 4 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)

We shall use a negative sign for an elevation below sea level, and a positive sign for an elevation above sea level.

Given:
Elevation of city A = -96 ft (below sea level)
Elevation of city C = -24 ft (below sea level)

Let x =  elevation of city D.

Part A.
Because the elevation of city D is 1/4 of the elevation of city C, therefore
x = (1/4)*(-24)

Part B.
Because 24/4 = 6, therefore
x  = -6 ft.


The elevation of city D is 6 feet below sea level.
The answer is negative because the elevation is below sea level.