The ratio of 6 feet to 18 inches is 72:18, which simplifies to 4:1. The correct answer is not among the given options.
Let's determine the correct ratios for each of the given pairs.
7 yards to 15 feet:
Since 1 yard is equal to 3 feet, we can convert both measurements to the same unit (feet) to simplify the comparison.
7 yards * 3 feet/yard = 21 feet
Therefore, the ratio of 7 yards to 15 feet is 21:15. The correct answer is not among the given options.
6 feet to 18 inches:
There are 12 inches in 1 foot. Converting both measurements to the same unit (inches), we get:
6 feet * 12 inches/foot = 72 inches
Therefore, the ratio of 6 feet to 18 inches is 72:18, which simplifies to 4:1. The correct answer is not among the given options.