A baseball is tossed upward from the ground. The height of the ball in feet can be modeled by the function f(x) = -3x2 + 18x where x is the time in seconds after the ball is released. Approximately how long it takes the ball to hit the ground?​

where is the triangle?

answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d

a ≈ 172.05

step-by-step explanation:

the pictures.