Heather dropped a water balloon over the side of a building from a height of 80 feet. The approximate height of the balloon at any point during its fall can be represented by the following quadratic equation. h= -16squared plus 80. About how long did it take for the balloon to hit the ground?

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?