Find the vertex for this quadratic function: y=-3x^2+6x+1

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet

The figure shows the front of a building in the shape of a trapezoid. what is the area of this trapezoid? 102 ft² 132 ft² 168 ft² 204 ft²

What is the area of the regular 24-gon with radius 5 mm