Final answer:
Juana ate 15 cookies after applying 10% to the total number of cookies (150) she baked for the bake sale.
Step-by-step explanation:
Juana baked 150 cookies for the bake sale and ate 10% of them. To find out how many cookies Juana ate, we need to calculate 10% of 150.
Here's the calculation:
- Determine 10% as a decimal: 10% = 0.10.
- Multiply the total number of cookies by the decimal: 150 × 0.10.
- Calculate the result: 150 × 0.10 = 15 cookies.
So, Juana ate 15 cookies out of the 150 she baked for the sale.