Put 16 where n is, then do the arithmetic.
... a(16) = -6 + 3(16 -1)
... a(16) = -6 + 45
... a(16) = 39
Answer:
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Answer:
i think i used it before
Step-by-step explanation:
Answer:
use desmos to figure it out.

Explanation:
Area is pi×r^2 and you times it by the fraction of the circle you have as its not a full circle.