Question

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)

Answer 1

A) 1/2*12 = 6 ft above sea level

B) Because City D is 1/2 of 6, it cannot be negative because we are not multiplying anything by a negative number.

Answer 2

Answer:

Part A: $\dfrac{1}{2}\times 12\text{ feet}$

Part B: 6 feet above sea level and positive

Step-by-step explanation:

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 $\dfrac{1}{2}$ of the elevation of city C.

Part A: Expression which shows Elevation of city D in feet above sea level.

$\text{Elevation of city D}=\dfrac{1}{2}\times \text{Elevation of city C}$

$\text{Elevation of city D}=\dfrac{1}{2}\times 12$

Part B: Simplify the expression of part A

$\text{Elevation of city D}=\dfrac{1}{2}\times 12=6\text{ feet}$

The elevation of city D is 6 feet above sea level.

It would be positive because above sea level height is positive and below sea level takes negative.