Answer :
[tex]a\cdot10^n\ is\ scientific\ notation\ if\ a\in\left<1;\ 10\right)\\\\a)\ 73.4\cdot10^5-NO-(73.4 > 10)\\\\b)\ 0.09\cdot10^7-NO-(0.09<1)\\\\c)\ 80\cdot10^3-NO-(80>10)\\\\d)\ 4.22\cdot10^{-3}-YES[/tex]
Lesson 2: Scientific Notation quick check
1. D) 4.22x10^-3
2. A) 7.08x10^-8
3. A) 6.1x10^-7
4. D) 1.25x10^-4
5.C) Doubling n results in doubling the value of the expression.
6. B) 2.45x10^5
7.A) 3x10^3
Please use this for double checking your answers!