Question

Which number is not in scientific notation? (5 points)

11 ⋅ 1021
5.7 ⋅ 109
3.1 ⋅ 10−12
1.67 ⋅ 10−5

Answer 1

A) 11 ⋅ 10^21

Answer 2

9514 1404 393

Answer:

(a) 11·10^21

Explanation:

"Scientific notation" has a mantissa that has one digit to the left of the decimal point. The number 11·10^21 has two digits to the left of the decimal point, so is not in the form required by scientific notation.

11·10^21 is not in scientific notation

_____

It would be correctly written in scientific notation as as 1.1·10^22.