Question

At the grocery store, one brand of ice cream costs $4.50 for 48 ounces. The same brand costs $7 for 128 ounces or $3 for 64 ounces. Which size has the lower unit price? Responses 64 ounces 64 ounces - no response given 128 ounces 128 ounces - no response given 48 ounces 48 ounces - no response given They cost the same per ounce.

Answer 1

To determine which size of ice cream has the lower unit price, we need to calculate the price per ounce for each option:

1. **48 ounces for $4.50:**
\[
\text{Unit price} = \frac{\$4.50}{48 \text{ ounces}} = \frac{4.50}{48} \approx 0.09375 \text{ dollars per ounce}
\]

2. **64 ounces for $3:**
\[
\text{Unit price} = \frac{\$3}{64 \text{ ounces}} = \frac{3}{64} \approx 0.046875 \text{ dollars per ounce}
\]

3. **128 ounces for $7:**
\[
\text{Unit price} = \frac{\$7}{128 \text{ ounces}} = \frac{7}{128} \approx 0.0546875 \text{ dollars per ounce}
\]

Now, let's summarize the unit prices:

- 48 ounces: **$0.09375 per ounce**
- 64 ounces: **$0.046875 per ounce**
- 128 ounces: **$0.0546875 per ounce**

The 64-ounce option has the lowest unit price at approximately **$0.046875 per ounce**.

Therefore, the answer is **64 ounces**.