Discover Questions

Help me answer these please!? What can cause evolution to occur? If f(y1, y2) = 1/k exp(-1/2 [(y1)^2 +(y2)^2 +2y1y2 - 22y1 - 14y2 +65] represents a bivariate normal density function. Find k? How can I get electricity and water on a private dirt road? That is within four miles of any eletricity. Also what would be the cost etc?? Pi in base 12 starts out 3.1848. Is this more or less accurate than the base 10 value 3.1416?