What does this mean I'm helping my cousin I dont know what this is a rectangle by what part

What does it mean by solve the exponential equation for x?

Two lines parallel to a third line are parallel to each other. always sometimes or never

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