Question

Mark studies a group of 30 whales. If each whale weighed approximately 3.8 x 105 pounds, find the total weight of all 30 whales. Express your answer in scientific notation.​

Answer 1

`= 1.14 * 10^(7)pounds`

Explanation:

If each whales weighed

`3.8 * {10}^(5)`

Then 30 whales weighed

`30 * 3.8 * {10}^(5)`

`=114 * {10}^(5)`

`= 1.14 * 10^(2) * {10}^(10)`

Applying the law of indices we obtain

`= 1.14 * 10^((2+ 5))`

`=1.14 * 10^(7)pounds`