Question

Determine the sum: 26.5 × 104 + 9.4 × 104. Write your answer in scientific notation.

A. 17.1 × 104

B. 35.9 × 109

C. 3.59 × 105

D. 17.1 × 108

Answer 1

`\large\boxed{C.\ 3.59*10^5}`

Explanation:

`\text{The scientific notation:}\\\\a\cdot10^k,\ \text{where}\ 1\leq a<10\ \text{and}\ k\in\mathbb{Z}.\\--------------------\\\\\text{We have}\\\\26.5*10^4+9.4*10^4=(26.5+9.4)*10^4=35.9*10^4\\\\=3.59*10*10^4=3.59*10^5`