Polynomial is an expression that involves only the operations of addition, subtraction, multiplication of variables.
Given the quadratic model f(x) = -5x² + 200
For the ball to be 50 m above ground:
f(x) = 50
50 = -5x² + 200
5x² = 150
x² = 30
x = 5.48 seconds
The ball is 50 meters from the ground after 5.48 seconds.
Find out more on polynomials at: https://brainly.com/question/1214333
