Final answer:
The correct formatted select statement to show the given result set is: SELECT invoice_total, invoice.customer_id, billing_state FROM invoice JOIN customer ON invoice.customer_id = customer.customer_id.
Step-by-step explanation:
The correct formatted select statement to show the given result set with the invoice total, customer's customer id, and the invoice's billing state is:
SELECT invoice_total, invoice.customer_id, billing_state FROM invoice JOIN customer ON invoice.customer_id = customer.customer_id