Question

A human hair was measured to have a diameter of 3.15 times 10 Superscript negative 3 inches. The width of a piece of paper was measured to be 3.94 times 10 Superscript negative 3 inches thick.

In scientific notation, how much thicker is the piece of paper than the hair?

0.79 x 10 ^ -6 inches

7.9 x 10 ^-4 inches

0.79 x 10 ^-3 inches

7.9 x 10 ^-2 inches

Answer 1

Answer:

0.79 x 10 ^-3 inches

Step-by-step explanation:

thickness of hair

3.15 times 10 Superscript negative 3 inches = 3.15 x 10 ^-3 inches

thickness of paper

3.94 times 10 Superscript negative 3 inches thick = 3.94 x 10 ^-3 inches

thickness of paper - thickness of hair

3.94 x 10 ^-3  -  3.15 x 10 ^-3

= 0.79 x 10 ^-3