Final answer:
To find the height of the printed letters after the shirt shrank proportionally, we can use the ratio of the before and after measurements. The new height of the letters is 3.78 inches.
Step-by-step explanation:
To find the height of the printed letters after the shirt shrank proportionally, we need to determine the ratio of the before and after measurements. The ratio of the shoulder span before and after the wash is 34/36. We can use this ratio to find the new height of the letters.
The new height of the letters can be calculated as:
New height = (Ratio) * Original height = (34/36) * 4 inches = 3.78 inches
Hence, the printed letters on the shirt appear 3.78 inches tall after the wash.