which number is not in scientific notation? URGENT! BRAINLIEST WILL BE GIVEN

1) 11 . 10^21

2) 5.7 . 10^9

3) 3.1 . 10^-12

4) 1.67 . 10^-5

which number is not in scientific notation? URGENT! BRAINLIEST WILL BE GIVEN

1) 11 . 10^21

2) 5.7 . 10^9

3) 3.1 . 10^-12

4) 1.67 . 10^-5

Answer:Step-by-step explanation: