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WHAT IS 1+1

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

What is the simplified form of square root of 400 to the 100th power ?

Answer for 15 points (look at the image)