Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_15416002_1 (r_miles_ VARCHAR, chi VARCHAR)
### Question:
What are the miles when the Carvill Hurricane Index (CHI) is equal to 9.9?
### Answer:
SELECT r_miles_ FROM table_15416002_1 WHERE chi = "9.9"