Converting Units

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If 1 foot is approximately 0.3 meters, which of the following best approximates the number of feet in 5 meters?

Review: Converting Units


Explanation

We can use fraction terminology here. We are given a fixed ratio:



To get 5 meters without altering the ratio, we can multiply by 1:





The loads of fractions may seem laborious, but they prevent error, and by being quite organized, you can move quickly with complete confidence. Anyway, the number of feet corresponding to 5 meters is . We can switch to fractions:



We have our answer. An alternative way to set up the calculation which is mathematically identical is to write and then solve for x by cross-multiplying. The correct answer is (A).


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