​whats quadratic equation form that'll show how many seconds a ball is in the air until it hits the ground PLS HELP ASAP!!

Do you have a more precise queestion?    That is a bit vague to me.....

f(x) = ax^2+bx+c

x = (-b+sqrt(b^2-4ac))/2a

x = (-b-sqrt(b^2-4ac))/2a

if that is what u mean then there