Answer:
(0,0)
Step-by-step explanation:
The angles w and 80 are inscribed angles in the top left and bottom right corners respectively. They are opposite angles in this inscribed quadrilateral. Because they are opposite angles in the inscribed quadrilateral, they add to 180 degrees.
w+80 = 180
w+80-80 = 180-80
w = 100
Answer: Choice D
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

