Answer: 13 / 18 pounds
Step-by-step explanation:
An adult short-eared owl weighed 1/2 pound while a baby short-eared owl weighed 2/9 pound.
The total weight of the two owls will be the addition of both of their weights. This will be:
= 1/2 + 2/9
Note that the LCM of 2 and 9 is 18
= 9/18 + 4/18
= 13/18
Therefore, the answer is 13/18 pounds.