Question

Is 21.8 x 10 to the power of 8 a scientific notation

Answer 1

`\large\boxed{2.128*10^9}`

Explanation:

The scientific notation:

`a\cdot10^k\\\\1\leq a<10,\ k\in\mathbb{Z}`

We have:

`21.8*10^8`

21.8 >10

21.8 = 2.18 × 10

Thereofre:

`21.8*10^8=2.18*10*10^8`

Use

`a^n\cdot a^m=a^(n+m)`

`21.8*10^8=2.18*10^1*10^8=2.18*10^(1+8)=2.18*10^9`