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The Baldwin family walked four over five of a mile in four over nine of an hour. What is their unit rate in miles per hour?

A. four-ninths over four-fifths equals four over nine mile per hour
B. four-fifths over four-ninths equals one and four-fifths miles per hour
C. four-ninths over four-fifths equals one and four-fifths miles per hour
D. four-fifths over four-ninths equals four over nine mile per hour

Respuesta :

derrekandrews
B, four-fifths over four ninths

Answer:  Option 'B' is correct.

Step-by-step explanation:

Since we have given that

Number of miles the Baldwin family walked is given by

[tex]\frac{4}{5}\ miles[/tex]

Number of hours the Baldwin family walked is given by

[tex]\frac{4}{9}\ hour[/tex]

So, we need to find the unit rate in miles per hour.

[tex]Speed=\frac{Distance}{time}\\\\Speed=\frac{\frac{4}{5}}{\frac{4}{9}}\\\\Speed=\frac{9}{5}=1\frac{4}{5}\ mph[/tex]

Hence, Option 'B' is correct.

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