Question

What is (3.2 × 10^4) × (2 × 10^–2)?

                                   

 A. 6.4 × 10^–8   B. 6.4 × 10^–2   C. 6.4 × 10^2   D. 6.4 × 10^8

Answer 1

`(3.2\ *\ 10^4)\ *\ (2\ *\ 10^(-2))=3.2\ *\ 2\ *\ 10^(4+(-2))\\\\=6.4\ *\ 10^2\\\\\\Answer:C.`