We know that y is 0.8 miles right now. 0.8 miles. We also know that dy dt, the rate at which y is changing with respect to time, is what? Well, y is decreasing by 60 miles per hour. So let me write it as negative 60 miles per hour. Now, similarly, let's say that this distance right over here is x. x is 0.6 miles right at this moment. So we know that x is equal to 0.6 miles.