Question

Mrs. Wright's baby drinks four ounces of baby formula every three hours. A 16-ounce can of formula costs $4.45. How much will it cost Mrs. Wright to buy formula for seven days? Explain how Mrs. Wright can figure out how much formula she needs so that she knows how much she will spend each week. Explain how you found the answer and what operations you used to find the answer.

Answer 1

Mrs. Wright will spend $62.30 for a week's supply of formula, which is calculated by determining the baby's daily and weekly consumption and then multiplying by the cost of the formula per can.

Step-by-step explanation:

The subject of this question is Mathematics, specifically focusing on the practical application of unit rates and arithmetic operations to calculate costs over time.

To determine how much formula Mrs. Wright's baby consumes in a day, we multiply the amount the baby drinks per feeding by the number of feedings in a day. Since the baby drinks 4 ounces every 3 hours, there are 8 feedings in a 24-hour period (since 24 ÷ 3 = 8). Thus, the baby drinks 4 ounces × 8 feedings = 32 ounces per day. Over seven days, the baby will consume 32 ounces × 7 days = 224 ounces.

Next, to calculate how many 16-ounce cans Mrs. Wright needs for seven days, we divide the total weekly consumption by the size of one can: 224 ounces ÷ 16 ounces/can = 14 cans. The cost for one week is then 14 cans × $4.45 per can = $62.30.

Therefore, Mrs. Wright will spend $62.30 to buy formula for seven days.