Answer:
After 3 seconds
Step-by-step explanation:
Given

Required
Seconds to attain maximum height
The maximum of a quadratic function
is calculated using:

So, we have:

Where:
and 
So:


Cancel out negatives


Answer:
1.c
2.A
3.E
4.B
5.D
Step-by-step explanation:
hope my answer are correct .
Answer:
Its a i just took the test
Step-by-step explanation: