Answer:
 0.006 miles per hour 
Explanation:
We are given;
Speed in cm per minute ( 17 cm per min)
We are required to convert cm per minute to miles an hour 
we need to know that;
1 miles = 160934 cm 
1 hour = 60 minutes 
We can convert 17 cm to miles and 1 minute to hours 
17 cm = 17 ÷ 160934 cm 
 = 17/160934
1 minute = 1/60 hour
Therefore;
In miles per hour;
 = (17/160934) ÷ (1/60)
 = 0.00634 miles per hour 
 = 0.006 miles per hour 
Therefore, 17 cm per minute is equivalent to 0.006 miles per hour