Final answer:
Farmer Jim planted 10 lettuces. To find this, we converted the plot length to centimeters (150 cm) and divided by the distance between each lettuce (15 cm).
Step-by-step explanation:
To determine how many lettuces Farmer Jim planted, we need to calculate the number of 15 cm segments that fit into the total length of the plot, which is 1.5 meters. First, we convert the length of the plot to centimeters because the spacing of the lettuce is given in centimeters. Thus, 1.5 meters equals 150 centimeters. Now we divide the total length of the plot by the distance between the lettuces:
Total number of lettuces = Total length of the plot / Distance between each lettuce
Total number of lettuces = 150 cm / 15 cm
Total number of lettuces = 10 lettuces
Therefore, Farmer Jim planted 10 lettuces.