Question

What is this answer? ( 7×10^(11) ) × ( 3 × 10^(-13) )

Answer 1

`color(blue)(0.21`

Explanation:

`(7*10^(11) ) * (3 * 10^(-13))`

`=> 7 * 3 * 10^11 * 10^(-13)`

`=> 21 * (10^ (11-13))`

`=> 21 * 10^(-2) = 21/100 = 0.21`