Question

FAN AND MEDAL
Which number is not in scientific notation?
9 ⋅ 1019
7.8 ⋅ 106
1.45 ⋅ 10−7
0.33 ⋅ 10−15

Answer 1

What are the rules for "Scientific Notation"?

Answer 2

has someone answered your question?

Answer 3

The exponent in scientific notation is equal to the number of times the decimal point must be moved to produce a number between 1 and 10?

Answer 4

Are any of those numbers NOT between 1 and 10?

Answer 5

do i have to work each one out first?

Answer 6

NO, you just look at the decimal portion (ignore the exponents).

9 - Yup. That's between 1 and 10
7.8 - Yup. That's between 1 and 10

Keep going.

Answer 7

1.45, yes?
0.33, no?