Answer this pls thank u,

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)