Verified Answer :

xingenya

Because
rate = distance/time
r = \(\frac{4 miles}{45 minutes}\)
so it would be
r = \(\frac{4}{45}\) miles per minute

Or if it was miles per hour:
\(\frac{4}{45} = \frac{x}{60}\)
Cross multiplication gives us
45x = 240
\(\frac{16}{3}\) mph

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