Evaluate (c^-2)^0 where c=4

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!