Final answer:
Without additional information on the ship's speed and travel time or specific context for the question, we cannot accurately determine the correct distance value in #7.
Step-by-step explanation:
To determine the answer to the question Assuming that the ship travels at a constant speed, what will be the value in #7? Write it below, to the nearest tenth, additional context is required. Specifically, the problem should provide information on the speed of the ship and the time it has been traveling, or the distance traveled in a certain amount of time. Without this, we cannot calculate the distance the ship would have covered. However, from the provided options which are (a) 31.5 miles, (b) 63.0 miles, (c) 78.8 miles, and (d) 120.5 miles, these are values representing potential distances traveled by the ship. Given the information extracted from the other exercises mentioned, we find details about speeds, times, and distances related to cars, trains, and ships but nothing that links directly to the ship's travel pertinent to question #7. We need a specific scenario from the ship's travel to connect the given values for a correct response.