Answer:
(0,6).
Step-by-step explanation:
Consider the standardised form of y=ax2+bx+c. Written as y=a(x2+bax)+c. xvertex=(−12)×ba → (−12)×0−1=0.
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I think its 6 i'm not sure hope this might help
The sum of n terms of a geometric series is given by

Substituting the given numbers, you have

There are 6 terms in the series.
The answer is 100 degrees.