Question

Suppose cheese costs $22 per kilogram. Ella buys a 75-gram piece of cheese and Ali buys a 250-gram piece of cheese.

How much more did Ali pay for his cheese?

Responses

$1.10
$1.10

$3.85
$3.85

$7.15
$7.15

$11.00

Answer 1

First, we need to calculate how much each person paid for their respective amounts of cheese.

**1. Calculate the cost for Ella:**
- Ella buys 75 grams of cheese.
- Since there are 1000 grams in a kilogram, 75 grams is equal to \( \frac{75}{1000} = 0.075 \) kilograms.
- The cost of cheese per kilogram is $22.

So, Ella's cost:
\[
\text{Cost} = 0.075 \, \text{kg} \times 22 \, \text{USD/kg} = 1.65 \, \text{USD}
\]

**2. Calculate the cost for Ali:**
- Ali buys 250 grams of cheese.
- 250 grams is equal to \( \frac{250}{1000} = 0.25 \) kilograms.

So, Ali's cost:
\[
\text{Cost} = 0.25 \, \text{kg} \times 22 \, \text{USD/kg} = 5.50 \, \text{USD}
\]

**3. Find the difference in cost:**
Now, we need to find out how much more Ali paid compared to Ella:
\[
\text{Difference} = 5.50 \, \text{USD} - 1.65 \, \text{USD} = 3.85 \, \text{USD}
\]

Thus, Ali paid **$3.85** more for his cheese.

The correct response is:
**$3.85**.