Final answer:
The null and alternative hypotheses for testing the proportion of residents favoring annexation of the adjoining bridge are as follows: H0: The proportion is greater than or equal to 42%. H1: The proportion is less than 42%.
Step-by-step explanation:
The null and alternative hypotheses in this scenario can be stated as follows:
Null hypothesis (H0): The proportion of residents favoring annexation of the adjoining bridge is greater than or equal to 42%.
Alternative hypothesis (H1): The proportion of residents favoring annexation of the adjoining bridge is less than 42%.
To test these hypotheses, a hypothesis test needs to be conducted using appropriate statistical methods and data.