Which is the better buy?

For each problem, you have two numbers. Remember that you need to find how much each liter costs.

Do you you think you should
add?
subtract?
multiply?
divide?

I'll be glad to check your answers.

You'd divide the numbers?

Yes, divide.

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okay,

what would you divide the numbers by?

To determine which is the better buy between 2.9L of detergent for $4.56 and 3.8L for $5.78, we can calculate the price per liter for each option.

For the first option, the price per liter can be found by dividing the total cost ($4.56) by the volume (2.9L):
Price per liter = $4.56 / 2.9L = $1.5738 per liter (rounded to four decimal places).

For the second option, the price per liter can be found by dividing the total cost ($5.78) by the volume (3.8L):
Price per liter = $5.78 / 3.8L = $1.5211 per liter (rounded to four decimal places).

Comparing the two price per liter values, we find that the second option, which costs $1.5211 per liter, is the better buy. It provides a better value for money compared to the first option, which costs $1.5738 per liter.

Therefore, if you are looking to maximize the amount of detergent for your money, it is more economical to purchase the 3.8L option for $5.78.