Question

The diameter of a human hair is about 0.00067 inches in length. How is this length

expressed in sclentific notation?

A 6.7 x 10 4in.

B 67 x 10 4 In.

C 6.7 x 10-4 in.

D 67 x 10-4 in.

Answer 1

C

Explanation:

All numbers in scientific notation or standard form are written in the form m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

Therefore, the decimal number 0.00067 written in scientific notation is 6.7 × 10-4.