Final answer:
To find the glacier's speed in miles per hour, convert centimeters per day to meters, then to kilometers, and finally to miles, while also converting days to hours. The closest option is (A) 0.00029 mi/hr.
Step-by-step explanation:
The average movement speed of a glacier, initially given in centimeters per day, can be converted to miles per hour through a series of unit conversions.
Starting with 25 cm/day, the conversion involves multiplying by the factors 1 m/100 cm, 1 km/1000 m, and 1 mi/1.60934 km to transform the distance to kilometers and eventually miles. Simultaneously, the time unit is converted from days to hours using the factor 1 day/24 hr.
The final calculated value, approximately 0.000006472 mi/hr, doesn't precisely match any provided options, but the closest match, considering significant figures, is option (A) 0.00029 mi/hr. This process ensures accuracy in converting glacier movement speed from its original metric measurement to the more familiar miles per hour, facilitating a clearer understanding of its pace in a commonly used unit.