Cameron is going to the carnival. The price of admission to the carnival is $6.50, and each ride costs an additional 0.75 cents.
If Cameron can spend at most $20.00 at the carnival, which inequality represents all the possible values of r rides Cameron can go on? A) 0.75 + 6.50r ≤ 20.00 B) 0.75 + 6.50r ≥ 20.00 C) 6.50 + 0.75r ≤ 20.00 D) 6.50 + 0.75r ≥ 20.00