How do i find the radius or diameter of each circle with dimensions

The letter tiles shown below are in a bag. whiteout looking i am going to draw one tile. what are my chances of drawing g?

What is the solution to the equation 9^(x+1) =27

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.