What answer represents this number in scientific notation?

Question

0.000000916
A. 916*10^-8
B. 9.16*10^-6
C. 916*10^8
D. 9.16*10^6
A?
Thanks

Answer 1

With A and B I get the same answer.

Answer 2

Well Anonymous,
I can tell you for sure that it is NOT A. Why? Because it's not in scientific notation.
Let's do it together.
0.000000916
Let's count our zeroes.
0.0(1)0(2)0(3)0(4)0(5)0(6)196
So, we have 6 zeroes.
We happen to be moving the decimal to the right, so the exponent is negative.
So we have 916*10^-6.
But, as I said, That ^^^ Is NOT the answer because it is not in scientific notation.
Let's put it in scientific notation. a number needs to be greater than one but less than 10 to be in scientific notation.
So, the answer is.... (drum-roll Please)

9.16*10^-6. Which is answer b.
Cheers,
Anonymous :D

Answer 3

Thanks alot:)

Answer 4

Your welcome Anonymous.

P.S. there seems to be alot of us "anonymous"s

Answer 5

thank you so much

Answer 6

heh seems we have gathered to the same place anonymous people