The area A of an equilateral triangle with a side of length s is ,. Suppose that A must be...

The area A of an equilateral triangle with a side of length s is ,. Suppose that A must be equal to 100 ft2 with an error of at most ±1 ft2. Determine graphically how accurately s must be measured in order to satisfy this error requirement. (Hint: Graph y =A, y =99, and y =101.)