Final answer:
Native American tribes in Washington can exercise sovereignty by operating casinos, as permitted by the Indian Gaming Regulatory Act.
Explanation:
An example of a way Washington's tribes can exercise their sovereignty is by operating casinos on their reservations. The Indian Gaming Regulatory Act of 1988 has allowed Native American tribes to establish casinos, leading to the tribes gaining economic independence and the ability to fund services for their members like healthcare and education.
Learn more about Native American sovereignty and casinos here:
https://brainly.com/question/40874901
