4 Algebra 2 questions, help please. see attached images.

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Use the drop-down menus to complete the statements to match the information shown by the graph.

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.