Question

Which number is not in scientific notation?

Answer 1

0.023 × 10-5
1.85*10^-90
3.75*10^17
9.99*10^13

Answer 2

0.023 × 10-5

Answer 3

Yahoo, giving answers without any explanation is worthless and just generally horrible in every way.

Answer 4

sorry

Answer 5

Notice how the other three have 1 digit to the left of the decimal point.

Answer 6

yep

Answer 7

to put this in scientific notation
0.023 × 10-5
it should be rewritten as
2.3 x 10^(-7)

Answer 8

okayand how did u do that

Answer 9

Move the decimal place so that there is one digit to the left of it.
When you move the decimal place to the left, add 1 to the exponent each time.
When you move the decimal place to the right, subtract 1 from the exponent each time.