Question

complete the statement that describes the situation. the subway was going 18 miles per hour before it started slowing. as it approached its final destination, the subways speed decreased 3 miles per hour every second.

Explanation:

Step1: Analyze the problem context

The problem is about the speed of a subway, involving initial speed and a rate of speed decrease. This relates to concepts in Mathematics, specifically in the area of rates and linear relationships (could be part of Algebra or Calculus in terms of understanding change over time). But since it's a fill - in - the - blank (or verification) of values related to speed and deceleration, we can check the合理性 of the values.
The initial speed of a subway: 18 miles per hour is a reasonable speed for a subway before slowing. The deceleration rate: 3 miles per hour every second. Let's think about unit consistency (though the problem doesn't ask for unit conversion, just the values). If we consider that when a subway slows down, a deceleration rate of 3 miles per hour per second is a possible value (for example, if we convert to miles per hour per minute, it would be 360 = 180 miles per hour per minute, or to miles per hour per hour, 33600=10800 miles per hour per hour, but the problem just presents the values as is, and we are to accept or complete the statement with the given dropdown values (18 and 3). Since the problem is to complete the statement, and the values 18 (initial speed) and 3 (deceleration rate) make sense in the context of a subway slowing down (the initial speed is a typical subway speed, and the deceleration rate is a reasonable rate of decrease for the description).

Step2: Confirm the completion

The statement is completed with the values 18 (miles per hour before slowing) and 3 (miles per hour every second the speed decreased). So the completed statement is: "The subway was going 18 miles per hour before it started slowing. As it approached its final destination, the subway’s speed decreased 3 miles per hour every second."

Answer:

The subway was going 18 miles per hour before it started slowing. As it approached its final destination, the subway’s speed decreased 3 miles per hour every second.