Question

Express this is scientific notation

0.003045
A) 0.3045 x 10-2
B) 3.045 x 103
C) 3.045 x 10-3
D) 30.45 x 102
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Answer 1

Place the decimal point right after the first nonzero digit, which is 3.

So you'll go from this
`0.003045` to this
`3.045` after this move.

Now ask yourself: "how many spots must I move the decimal point to get back to 0.003045?"

The answer is "3 spots to the left"

The exponent of the final answer is -3
The negative indicates "move left" and the 3 tells us how many places to move the decimal

Therefore,
`0.003045 = 3.045 * 10^(-3)`

Answer: Choice C)
This is assuming you meant to write the -3 as an exponent