For ten points, identify this number, equal to the perimeter of a square with area 9.
This number times π is equal to the area containedby the curve with equation 9x2 + 16y2 = 144. A hexagon with this area would √225 have side length √4 3 . This number is equal to the integral from 1 to m of x +x,and it's the area of a cone with radius 2  2 and height 9/2. This is the area πof the triangle with vertices at the origin, the point (6, 6), and the point (2, 6).   This is equal to the derivative of x2 +4x at x = 4, and it's one tenth of 5 factorial. For ten points, identify this number, equal to the perimeter of a square with area 9.
This number times π is equal to the area containedby the curve with equation 9x2 + 16y2 = 144.
12