1. The problem asks to write a quarter of a billion in standard notation. 2. A billion is equal to 1,000,000,000 (one followed by nine zeros). 3. A quarter means one fourth, so we calculate \( \frac{1}{4} \times 1,000,000,000 \). 4. Multiply: \( \frac{1}{4} \times 1,000,000,000 = 250,000,000 \). 5. Therefore, a quarter of a billion in standard notation is 250000000.