Question

2.1 x 10^-3 x 2 x 10^2 =

a)
4.2 x 10^-5

b)
4.2 x 10^-1

c)
4.2 x 10^1

d)
4.2 x 10^-6

Answer 1

I believe it is B

Step-by-step explanation:

hope it helps. please let me know if it's wrong