2.3 × 10⁻⁴ is 20,000 greater than 1.15 × 10⁻⁸ . ( option D)
Indices, also known as exponents or powers, are mathematical notations that indicate the number of times a base is multiplied by itself.
2.3 × 10⁻⁴ and 1.15 × 10⁻⁸ are examples of indices where -4 and -8 are the index.
To know how much greater 2.3 × 10⁻⁴ is to 1.15 × 10⁻⁸ we divide 2.3 × 10⁻⁴ by 1.15 × 10⁻⁸
= 2.3 × 10⁻⁴ ÷ 1.15 × 10⁻⁸
= 20000
Therefore, 2.3 × 10⁻⁴ is 20,000 greater than 1.15 × 10⁻⁸ .