Question

1. the thickness of a cats hair is 1 x 10^(-4) mm and the thickness of a dogs hair is 1 x 10^(-3) mm. which animal has thicker hair? a) cat b) dog

Explanation:

Step1: Compare the exponents

We have cat's hair thickness $1\times10^{-4}$ mm and dog's hair thickness $1\times10^{-3}$ mm. In scientific - notation, when the coefficients are the same (both are 1 here), we compare the exponents. Since $- 3>-4$.

Step2: Determine the thicker hair

A larger exponent in scientific - notation for a positive number (when the coefficient is positive) means a larger number. So, $1\times10^{-3}>1\times10^{-4}$.

Answer:

B. Dog