a human hair has a diameter of about 4x10^-3 inches. A fingernail is about 0.011 inches thicker . how thick is a fingernail ?write your answer as a decimal to 3 places

Answer 1

To find the thickness of a fingernail, we need to add the diameter of the human hair (4 × 10^-3 inches) to the additional thickness of the fingernail (0.011 inches).

1. Convert the hair diameter from scientific notation to decimal: \[ 4 \times 10^{-3} = 0.004 \text{ inches} \]

2. Now, add the thickness of the fingernail: \[ 0.004 \text{ inches} + 0.011 \text{ inches} = 0.015 \text{ inches} \]

Therefore, the thickness of the fingernail is 0.015 inches when rounded to three decimal places.