Final answer:
To find the total weight of flour used in 4 weeks, multiply 840 grams/day by 28 days. Convert the weight from grams to kilograms by dividing by 1000. Genevieve used 23.52 kilograms of flour in 4 weeks.
Step-by-step explanation:
To find the total weight of flour used in 4 weeks, we need to multiply the amount of flour used each day by the number of days in 4 weeks. Each day, Genevieve used 840 grams of flour, so in 4 weeks (28 days), she used:
840 grams/day × 28 days = 23,520 grams
Since the question asks for the weight in kilograms, we need to convert grams to kilograms by dividing the weight by 1000:
23,520 grams ÷ 1000 = 23.52 kilograms
Therefore, Genevieve used 23.52 kilograms of flour in those 4 weeks.