1 Answer

Xjshiya · Answer 1 · 2020-03-02T11:51:30+0000

Answer:

4 bilion = 4 × 10⁹

Explanation:

The scientific notation:

$a\cdot10^k$

where

$1\leq a<10,\ k\in\mathbb{Z}$

4 billion:

in USA: 4,000,000,000

in Europe: 4 000 000 000 000

$4\underbrace{000000000}_9=4\cdot10^9$