Answer: D. 20 miles 1/2 hour
Step-by-step detailed explanation:
To calculate the lowest speed in miles per hour, we need to find the option that covers the least distance in the most amount of time.
To determine the lowest speed, we divide the distance by the time:
A. 6 miles / 1/8 hour = 48 miles per hour
B. 11 miles / 1/4 hour = 44 miles per hour
C. 16 miles / 3/8 hour = 42.67 miles per hour
D. 20 miles / 1/2 hour = 40 miles per hour
Based on these calculations, D, 20 miles in 1/2 hour, represents the lowest speed at 40 miles per hour. Hope this helps!