How do you write 4,000,000 in scientific notation?

To write 4,000,000 in scientific notation, follow these steps:

Identify the decimal point: The number 4,000,000 can be written as 4.000000. The decimal point is at the end of the number.

Move the decimal point: Move the decimal point to the left until it is after the first non-zero digit (4). This gives us 4.0.

Count the number of places moved: The decimal point moves 6 places to the left (from the end of the number to after the 4).

Write the number as a product of a power of 10: Since the decimal moved 6 places to the left, the exponent of 10 will be 6.

Thus, 4,000,000 in scientific notation is written as:

4 × 10^6.