A ping pong ball is shot from a height of 4 feet, and reaches its maximum height of 10 feet 3 seconds later. Write the equation and find how long will it take the ping pong ball to hit the ground? Round your answer to the nearest hundredth.

I found the equation (through a lot of guessing on d e s m o s .com), but not really sure how to explain how I got the answer, i learned how to do it a couple years ago but now i forgot, sorry about that.

the equation is h(t) = -1/1.5 * (x - 3)^2 + 10

There is a formula for it but I forgot the exact formula of the values, but this is the equation definitely.

I hope this helps some, sorry i couldn't do more!