Final answer:
To determine the cost of 3.75 kg of chocolate, the cost per kilogram is calculated as $6.00 from the given 0.7 kg chocolate cost of $4.20. Multiplying by 3.75 kg yields a total cost of $22.50.
Step-by-step explanation:
The subject of this question is Mathematics, more specifically, it pertains to proportional reasoning which is often taught in Middle School.
We are given that 0.7 kg of chocolate costs $4.20. To find the cost of 3.75 kg of chocolate, we can calculate the cost per kilogram first and then multiply by 3.75 kg.
First, we calculate the price per kilogram by dividing the cost of 0.7 kg of chocolate by the weight:
Price per kilogram = Cost / Weight = $4.20 / 0.7 kg = $6.00 per kg
Now, we can find the total cost for 3.75 kg:
Total cost = Price per kilogram * Desired weight = $6.00/kg * 3.75 kg = $22.50
Therefore, 3.75 kg of chocolate would cost $22.50.