6 1/4 inches
Step-by-step explanation:
Tim plants tomato seeds in the garden 3 1/4 inches i.e. 13/4 inches below the ground level.
After one month the tomato plant has grown a total of 9 1/2 inches i.e. 19/2 inches.
So, it first grew up to ground level then it grew above ground level.
Therefore, the height of the plant above the ground level will be
[(19/2)-(13/4)] =(38-13)/4 =25/4 inches i.e. 6 1/4 inches.