Question

The elevation of city A is 80 feet below sea level; the elevation of city C is 16 feet below 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)

Answer 1

Answer:

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Answer 2

Given :

• The elevation of city A is 80 feet below sea level

                          $A = - 80$

• the elevation of city C is 16 feet below sea level

                         $C = - 16$

• The elevation of city D is 1 over 2 of the elevation of city C.

                        $D = \frac{1}{2} [ C ]$

Solution :

Part A: Write an expression to represent the elevation, in feet, of city D.

                       $D = \frac{1}{2} [-16]$

Part B: Solve the expression and explain why the answer is negative or positive.

                 $D = \frac{1}{2} [-16] = -8$  

As a result Elevation of city D is $-8$ feet.

Here founded answer is negative due to $-8$ feet below sea level.