Final answer:
The number 1.5x10⁸ in standard decimal form is 150,000,000, with the decimal point moved 8 places to the right due to the exponent on 10.
Step-by-step explanation:
The number 1.5x10⁸ is already written in scientific notation, which is the standard form for expressing large numbers. To write it in standard decimal form, you would move the decimal point to the right 8 places because of the exponent on 10. Thus, the number becomes 150,000,000.
Scientific notation is used to make large or small numbers more manageable and it simplifies arithmetic operations such as multiplication and division. Numbers are typically written in scientific notation as a product of a number between 1 and 10 and a power of 10. For example, 1.372568 times a million (10⁶) or 6 × 10¹⁴ when multiplying in scientific notation.