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anonymous

  • one year ago

Nina can ride her bike 63,360 feet in 3,400 seconds, and Sophia can ride her bike 10 miles in 1 hour. What is Nina's rate in miles per hour if there are 5,280 feet in a mile? Which girl bikes faster?

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  1. tkhunny
    • one year ago
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    Dimensional Analysis \(\dfrac{63360\;ft}{3400\;sec}\cdot\dfrac{1\;mile}{5280\;ft}\cdot\dfrac{3600\;sec}{1\;hr} = \) What \(\dfrac{miles}{hour}\)?

  2. anonymous
    • one year ago
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    Thanks!

  3. tkhunny
    • one year ago
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    What did you get? Can you do other transformations?

  4. anonymous
    • one year ago
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    \[\frac{63360}{\frac{5280\ 3400}{3600}}=\frac{216}{17}=12.7059 \text{ mph} \] Sorry, LaTex is not reproducing the text that it was fed.

  5. anonymous
    • one year ago
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    I got 12.7. And it was one of my answer choices,

  6. anonymous
    • one year ago
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    Thank you too robtobey!

  7. anonymous
    • one year ago
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    Very good. Congratulations.

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