Respuesta :
Answer:
100
Step-by-step explanation:
Got it on Khan Academy, math geeks.
Congrats. Now you got a free cheater's answer in Quadratic Word Problems (vertex form). Your welcome, cause I got it wrong.
Don't mind my attitude. TRUST ME AND YOU WON'T REGRET IT.
:P
PLEASE MARK BRAINLIEST AND THANKS. THANK YOU SO MUCH!
the height of the object at the time of launch is: 45 meters
the other answer '100' is WRONG