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Give the rate in miles per hour. Round to the nearest tenth.Caroline walks9 1/2 inches per secondHint

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You have that Caroline walks 9 1/2 inches per second.

9 1/2 = (18 + 1)/2 = 19/2 = 9.5

In order to find the rate in miles per hour you use the following identities:

1 mile = 63360 inches

1 hour = 360 seconds

The previous identities are used as converstion factors. You proceed as follow:

9.5 in/s x ( 1 mi / 63360 in) x ( 360 s / 1 h) = 0.05 mi/h ≈ 0.1 mi/h

Hence, Caroline walks 0.1 mi/h

User Wuxiekeji
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