Please help!
Find the area of the circle.
Use 3.14 for pi

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Ihave trouble finding the nth term of a linear sequence

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is