2) The diagram below shows the graph of a quadratic function f(x) = -2x2 + bx + c. a) Write down the value of c. b) Find the value of b and write down f(x). c) Calculate the coordinates of the vertex of the graph of f​

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet