Question

2. The weight of a paper clip is about 0.0009 grams . Write this number in Scientific notation *(2 points)O A. 9 x 10-3B. 9 x 104C. 9 x 10-4D. 9 x 104

Answer 1

Note that we can "get rid of" the point (in 0.0009) if we move it four spaces (numbers) to the right. These four spaces amount to the exponent in the Scientific notation. For we're moving to the right, the exponent must be negative. The answer is

$9\times10^{-4}$

C.