Final answer:
Option D, which is 20 miles in 1/2 hour, represents the lowest speed at 40 mph when compared to the other options provided.
Step-by-step explanation:
To determine which of the given options represents the lowest speed in miles per hour, we need to calculate the speed for each scenario by dividing the number of miles traveled by the time taken in hours. Speed is defined as distance divided by time.
- A. 6 miles in 1/8 hour: Speed = 6 miles / (1/8 hour) = 48 mph
- B. 11 miles in 1/4 hour: Speed = 11 miles / (1/4 hour) = 44 mph
- C. 16 miles in 3/8 hour: Speed = 16 miles / (3/8 hour) = 42.667 mph (approximately 42.7 mph)
- D. 20 miles in 1/2 hour: Speed = 20 miles / (1/2 hour) = 40 mph
Hence, among the choices given, option D, which is 20 miles in 1/2 hour, represents the lowest speed at 40 mph.