Final answer:
To calculate the time it will take for the train to be 4 miles away from the marker, you can use the equation 196 = 65h. After solving for h, it is found that the train will take approximately 3.02 hours.
Step-by-step explanation:
The student is asking for an equation to find the time it will take for a train moving at 65 miles per hour to cover the distance that would leave it only 4 miles away from a railroad marker that is currently 200 miles away. To solve for the time (h), we can use the basic formula for distance, which is:
Distance = Speed × Time.
The train has to cover a distance of (200 - 4) miles to be 4 miles away from the marker. Using the given speed of the train (65 miles/hour), we can set up the equation:
196 = 65h
Divide both sides by 65 to solve for h:
h = 196 / 65
h = 3.01538...
So, it will take the train approximately 3.02 hours to be 4 miles away from the railroad marker.