Final answer:
The contrapositive statement of 'If you are the president of the United States, then you are at least 35 years old' is: 'If you are not at least 35 years old, then you are not the president of the United States.'
Step-by-step explanation:
The contrapositive of the statement 'If you are the president of the United States, then you are at least 35 years old' is: If you are not at least 35 years old, then you are not the president of the United States.
A contrapositive statement is formed by negating and switching the hypothesis and conclusion of the original statement. So, if the original statement is true, then the contrapositive statement is also true.
In this case, the original statement states that being the president of the United States implies being at least 35 years old. So, if someone is not at least 35 years old, then they cannot be the president of the United States. This is the contrapositive statement.