Help please I need to find the height to find the area ​

Step-by-step explanation:

I'm not sure you will be satisfied with this but the area of a octagon is given by Area =2(1+√2)a²

Using this formula you get

a = 11 cm

Area = 2*(1 + √2)11²

Area = 2*(1 + 1.4142)*121

Area = 2*(2.4142)*121

Area = 4.8284*121

Area = 584.24

1. when "a" is a root of a polynomial, (x -a) is a factor of it. for the three roots given, the factors of the desired polynomial are (x +2)(x -1/2)(x -3).

in order to make the leading coefficient be negative, we need to multiply this product by a negative number. any negative number will do, but we choose a small (magnitude) value that will eliminate the fraction: -2.

then

f(x) = -2(x +2)(x -1/2)(x -3) = -(x +2)(2x -1)(x -3)

= -(2x² +3x -2)(x -3)

= -(2x³ -3x² -11x +6)

f(x) = -2x³ +3x² +11x -6

2. a graph created by the desmos on-line graphing calculator is shown, and the zeros are highlighted.

3. as indicated in part 1, the multiplier of this equation can be anything and the zeros will remain the same. you want a negative leading coefficient, so the "anything" is restricted to any of the infinite number of numbers that will make that be the case.

my computer is slow i can not see it sorry