Solve [3x+5]> 18. explain steps

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

I'll give brainliest if you answer right : )

In the rectangle below ac=30 units what is de