To convert the distance of 30 yards into feet, you should use the correct conversion factor that involves yards and feet.
1 yard is equal to 3 feet, so to convert from yards to feet, you would need to multiply the number of yards by the number of feet per yard. Therefore, the correct conversion would be:
Converting yards to feet by multiplying 30 yards by 3 feet/1 yard.
Thus, the correct option is:
Converting yards to feet by multiplying 30 yards by 3 feet/1 yard.
This correctly gives you the distance in feet, which you can then use in the formula \(d = vt\).