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Question: Using unit analysis, convert 6 dollars into Euros. The rate of currency exchange is 0.7 Euros per one United States dollar.


A ) 4.2 Euros
B ) 4.6 Euros
C ) 4.4 Euros
D ) 4.0 Euros

Steps to derive

1 Since 0.7 Euros = 1 dollar, 0.7Euros1dollar is equal to 1.

 [Cancel matching units.]
2 6 dollars = 6 dollars x 0.7Euros1dollar

 [Simplify.]
3 = 6 x 0.7 Euros

 [Multiply.]
4 = 4.2 Euros

5 6 dollars equals 4.2 Euros.



Hence the right answer is Option A

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