Final answer:
The numbers 120,000, 1,234,600,000, 63,100, and 143 are expressed in scientific notation as 1.2 × 10⁵, 1.2346 × 10⁹, 6.31 × 10⁴, and 1.43 × 10², respectively.
Step-by-step explanation:
The numbers 120,000, 1,234,600,000, 63,100, and 143 are written in standard form as follows:
- 120,000 is written in scientific notation as 1.2 × 10⁵
- 1,234,600,000 is written in scientific notation as 1.2346 × 10⁹
- 63,100 is written in scientific notation as 6.31 × 10⁴
- 143 is written in scientific notation as 1.43 × 10²
Standard notation refers to the normal way of writing numbers without exponents, as opposed to scientific notation which expresses numbers as a product of a coefficient (between 1 and 10) and a power of 10, making it easier to write very large or very small numbers compactly.