Final answer:
The expanded notation for 1,250,794,386 is the sum of each digit multiplied by its place value, and in scientific notation, it is 1.250794386 × 10^9.
Step-by-step explanation:
To write the expanded notation for the population of a country, which is 1,250,794,386, we break down each digit according to its place value and express it as a sum of each digit multiplied by its place value. Here is how it's done:
- (1 × 1,000,000,000) + (2 × 100,000,000) + (5 × 10,000,000) + (0 × 1,000,000) + (7 × 100,000) + (9 × 10,000) + (4 × 1,000) + (3 × 100) + (8 × 10) + (6 × 1)
When using scientific notation to express very large numbers, we follow a similar principle but represent the number in a much more concise form. For the given population number, it would be written as: