Answer:
D.
Step-by-step explanation:
2=-2,3=-3
2²=-2²,3²=3²
90
-12. The newsstand had 90 copies at the beginning of the day
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78
Here's our equation.

We want to find out when it returns to ground level (h = 0)
To find this out, we can plug in 0 and solve for t.


So the ball will return to the ground at the positive value of

seconds.
What about the vertex? Simple! Since all parabolas are symmetrical, we can just take the average between our two answers from above to find t at the vertex and then plug it in to find h!

Just a guess but 75 degrees?
Answer:
7/8 estimated would be about 1 and 6/11 is almost a half so it would be estimated 1/2 so 1 - 1/2 = 1/2