The range is the y-values. Here is the answer and explanation :)
2 x 10^7= 20,000,000
4 x 10^6= 4,000,000
20,000,000 - 4,000,000= 16,000,000.
In SI Notation its 16 x 10^6...
I don't really know it but i tried
Sum of Interior Angles of any poligon, where n is the number of sides: =
(n-2) × 180°
---------------------
(7 - 2) * 180° =
5 * 180 =
900°
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