Question

Which number is not in scientific notation?

6 ⋅ 10^25
2.01 ⋅ 10^−2
1.3 ⋅ 10^−4
0.5 ⋅ 10^3

Answer 1

I think it would be the second option

Answer 2

6 ⋅ 10^25
2.01 ⋅ 10^−2
1.3 ⋅ 10^−4
0.5 ⋅ 10^3

all is in scientific notation except 0.5 ⋅ 10^3 (last one)

0.5 ⋅ 10^3 = 5 x 10^2 ...this is in scientific notation