You're driving into canada and trying to decide whether to fill your gas tank before or after crossing the border. gas in the united states costs $2.58/gallon, in canada it's $1.29/l, and the canadian dollar is worth 79¢ in u. s. currency. where you should fill up?

It is more convenient to fill up in the United States.

Step-by-step explanation:

We convert a US gallon to liters:

1 Gallon equals 3.78541 liters.

Therefore, 1 US Gallon costs (3.78541) x (1.29) = 4.8831789 Canadian dollars.

Now we convert the price of a US gallon in Canadian territory to US dollars:

4.8831789 * 0.79 = 3.85771133 US dollars.

Conclusion: A gallon purchased in the United States costs 2.58 US dollars, while a gallon in Canada is equivalent to 3.85771133 US dollars. This way it is more convenient to fill up in the United States.

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step-by-step explanation: