Question

Which number is not in scientific notation?
11*10^21
5.7*10^9
3.1*10^-12
1.67*10^-5

Answer 1

http://en.wikipedia.org/wiki/Scientific_notation

Answer 2

scientific notation needs a number between 1 and 10

and multiplied by a power of 10... the power can be positive or negative

Answer 3

so just find the number which is greater than 10 and being multiplied by a power of 10

Answer 4

C would be correct?

Answer 5

nope its 3.1

you need to look at the numbers

11
5.7
3.1
1.67

which is greater than 10...?

Answer 6

11

Answer 7

yep... so the 1st choice is not in scientific notation

Answer 8

Thanks :)