1. Move the decimal point: Start with the number 53428400000. Imagine a decimal point at the end (53428400000.). Move the decimal point to the left until you have a number between 1 and 10. In this case, you'll move it 10 places to the left: 5.3428400000.

2. Count the decimal places: You moved the decimal point 10 places to the left.

3. Write the number in scientific notation: The number in scientific notation is: 5.34284 x 10^10

Explanation:

* 5.34284 is the number between 1 and 10.

* 10 is the base of the scientific notation.

* 10 is the exponent, representing how many places you moved the decimal point.