Question

Find the sum of (6.9 × 10⁶) and (5.9 × 10⁵). Write the final answer in scientific notation.

a. 1.28 × 10¹⁰
b. 12.8 × 10¹¹
c. 7.49 × 10⁵
d. 7.49 × 10⁶

Answer 1

To find the sum of (6.9 × 10⁶) and (5.9 × 10⁵) in scientific notation, you need to add the numbers and adjust the result to scientific notation format. The sum is 7.49 × 10⁶.

Step-by-step explanation:

To find the sum of (6.9 × 10⁶) and (5.9 × 10⁵) in scientific notation, you need to add the numbers and adjust the result to scientific notation format.

1. First, add the numbers: (6.9 × 10⁶) + (5.9 × 10⁵) = (6.9 + 0.59) × 10⁶ = 7.49 × 10⁶
2. Next, write the final answer in scientific notation: 7.49 × 10⁶

Therefore, the correct answer is option d. 7.49 × 10⁶.