I think it is 4.5 miles per hour
What do you mean? If you want it in order than you can say it. -17, -10.5, -4, 2.5, 9
The ball will hit the ground at 0.125 seconds
<h3>
Quadratic function</h3>
The equation of the function is a quadratic function, and the function is given as:

When the ball hits the ground, the value of h is 0.
So, the equation of the function becomes

Subtract 2t from both sides of the equation

Divide both sides by -2t

Divide both sides by 8

Hence, the ball will hit the ground at 0.125 seconds
Read more about quadratic functions at:
brainly.com/question/11631534
Step-by-step explanation:
When dividing or multiplying by a negative number, remember to flip the inequality sign.
-3x < 15
x > -5 (divide -3 on both sides, flip the inequality sign)
The correct options are 2 and 9. (D and E)
18 if it’s not, then 21. I did ratios i long time ago so i don’t fully remember them.