P=D•W what does this mean in a formula

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.