Final answer:
The mass of 140 blue whales, given that the average mass of one whale is 1.9 × 10⁵ kg, can be expressed in scientific notation as 2.66 × 10⁷ kg.
Step-by-step explanation:
The mass of one blue whale at a certain zoo is measured to be 1.9 × 10⁵kilograms. If we want to express the mass of 140 blue whales, we will multiply the mass of one whale by the number of whales:
- 1.9 × 10⁵ kg (mass of one blue whale) × 140 (number of blue whales) = 2.66 × 10⁷ kg.
Here's the step-by-step calculation:
- Start with the given average mass in scientific notation: 1.9 × 10⁵kg.
- Multiply the coefficient by the number of whales: 1.9 × 140 = 266.
- Keep the exponent the same because we're multiplying by a scalar, not an exponential value: 266 × 10⁵.
- Adjust the coefficient to be less than 10 for proper scientific notation: 2.66 × 10⁷ kg (since 266 × 10⁵ is equivalent to 2.66 × 10⁷).
Therefore, the mass of 140 blue whales in scientific notation is 2.66 × 10⁷ kg.