2 forms of writing this number.

3,209,003,812?

To express the number 3,209,003,812 in two different forms of writing, we can use both expanded form and scientific notation.

1. Expanded Form:
Expanded form breaks down the number into its individual place values. Here is the expanded form of 3,209,003,812:

3,000,000,000 + 200,000,000 + 9,000,000 + 3,000 + 800 + 10 + 2

2. Scientific Notation:
Scientific notation is a shorthand way to represent large numbers. It consists of two parts: the coefficient and the exponent. To write 3,209,003,812 in scientific notation, follow these steps:

Step 1: Move the decimal point to a position after the first non-zero digit. In this case, it is after the digit 3, so it becomes 3.209003812.

Step 2: Count the number of places you moved the decimal point. Since you moved it nine places to the left, the exponent will be -9.

Step 3: Write the number in the form of coefficient × 10^exponent. Therefore, 3,209,003,812 can be written as 3.209003812 × 10^9 in scientific notation.