A model airplane flies18 feet in 2 seconds. What is the airplane's speed in miles per hour? Round your answer to the nearest hundredth.

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19-10-2014
Mathematics

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A model airplane flies18 feet in 2 seconds. What is the airplane's speed in miles per hour? Round your answer to the nearest hundredth.

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luana luana · Answer 1 · 2014-10-19T19:18:19-04:00

luana luana

19-10-2014

[tex]Formula\ for\ speed\\\\ v=\frac{s}{t}\\\\ s=18\ feet\\\\ t=2\ seconds\\\\ v=\frac{18}{2}=9\frac{feet}{second}\\\\ 1\ foot= 0.000189393939\ miles\\\\ 1\ second=\frac{1}{3600}hour\\\\ 9\frac{feet}{second}=9*\frac{0.000189393939}{\frac{1}{3600}}=6,156\frac{mile}{hour}\approx6,16\frac{mile}{hour} [/tex]

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