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Answer: 4.2 kilometers after 3 minutes bc its 1.0729 kilometers after 1 minute. then it doubles every minute .
Step-by-step explanation: speed= distance divided by time method
The speed is the distance covered by an object at a particular time. Millie speed after three minutes will be equal to 16 miles per hour.
What is speed?
The speed is the distance covered by an object at a particular time. Therefore, it is the ratio of distance and time.
[tex]\rm{Speed = \dfrac{Distance}{Time}[/tex]
Given that Millie doubles her running speed every minute. Also, her starting speed is 2 miles per hour. Therefore, her speed in different time period can be written as,
Speed after 1 min = 2 × 2 miles per hour
= 4 miles per hour
Speed after 2 min = 2 × 4 miles per hour
= 8 miles per hour
Speed after 3 min = 2 × 8 miles per hour
= 16 miles per hour
Hence, Millie speed after three minutes will be equal to 16 miles per hour.
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