Final answer:
A newborn baby that eats 2.5 ounces of formula six times a day will require about 13.125 cups of formula for a week's supply.
Step-by-step explanation:
To calculate the number of cups of formula a newborn baby would need in a week, we have to multiply the amount the baby eats per feeding by the number of feedings per day and then by the number of days in a week. We know the baby eats 2.5 ounces of formula at each feeding and does so six times a day. Since there are 7 days in a week, we multiply 2.5 ounces by 6, and then by 7.
2.5 ounces/feeding × 6 feedings/day × 7 days/week = 105 ounces/week.
Next, we need to convert ounces to cups. There are 8 ounces in a cup, so we divide the total weekly ounces by 8:
105 ounces ÷ 8 ounces/cup = 13.125 cups per week.
Therefore, a week's supply for the baby should be about 13.125 cups of formula.