Answer:
Based on the information provided in the line plot, there are three marks above seven and two-thirds inches. Therefore, there are three bulbs with a length of seven and two-thirds inches.
To calculate the total length of these bulbs, we need to multiply their length by the number of bulbs, which gives:
7 and 2/3 inches x 3 bulbs = 23 inches
Therefore, the total length of all the bulbs that are seven and two-thirds inches is 23 inches.