A human hair has a diameter of about 4×10−3 inches. A fingernail is about 0.011 inches thicker. How thick is a fingernail? Write your answer as a decimal to 3 places.(1 point) inches

Answer 1

To find the thickness of a fingernail, we start with the diameter of a human hair, which is approximately $4\times {10}^{-3}$ inches, and then we need to add the thickness of the fingernail, which is given as $0.011$ inches thicker than the hair.

First, let's convert $4\times {10}^{-3}$ inches to a decimal:

$$4\times {10}^{-3}=0.004\text{ inches}$$

Now, we add $0.011$ inches to $0.004$ inches to find the thickness of the fingernail:

$$\text{Thickness of fingernail}=0.004+0.011=0.015\text{ inches}$$

Now, rounding to three decimal places, the thickness of the fingernail is:

$$\boxed{{\displaystyle 0.015}}\text{ inches}$$