What 2421200 in scientific notation?

Answer 1

Depending on how many significant figures you want, it can be
2.421200x10^6 (7 sig figs)
2.42120x10^6 (6 sig figs)
2.4212x10^6 (5 sig figs)
2.421x10^6 (4 sig figs)
2.42x10^6 (3 sig figs)
2.4x10^6 (2 sig figs)
2x10^6 (1 sig fig)

Answer 2

It is: 2.4212*10^6

Answer 3

It is 2.4212*10^6.