Answer :

To calculate the expected weight of a shipment containing 72 trees, follow these steps:

1. Identify the average weight per tree: First, determine the average weight of one tree. For this example, the average weight of a tree is given as 1.55 tons.

2. Identify the number of trees: Next, note the number of trees in the shipment, which is provided as 72 trees.

3. Calculate the total weight: To find the total expected weight of the entire shipment of trees, multiply the average weight per tree by the number of trees.

[tex]\[ \text{Total Weight} = \text{Average Weight per Tree} \times \text{Number of Trees} \][/tex]

Substituting the provided values:

[tex]\[ \text{Total Weight} = 1.55 \, \text{tons/tree} \times 72 \, \text{trees} \][/tex]

4. Perform the multiplication:

[tex]\[ \text{Total Weight} = 1.55 \times 72 = 111.6 \, \text{tons} \][/tex]

Therefore, the expected weight of the shipment containing 72 trees is 111.6 tons.

Given the options:
- 11.4 tons
- 111 tons
- 69 tons
- 31.8 tons

The closest match to our calculated total weight is 111 tons. While not exact, it is the closest approximation provided in the options.