Choose the most precise measurement in each set. \( \begin{array}{ll}\text { 1. } 7.0 \mathrm{~cm} ; 700 \mathrm{~cm} ; 7000 \mathrm{~cm} & \text { 2. } 30 \mathrm{~cm} ; 30 \mathrm{~m} ; 32 \mathrm{n}\end{array} \)

To determine the most precise measurement in each set, we need to look at the number of significant figures in each measurement. 1. **Set 1: \( 7.0 \mathrm{~cm} ; 700 \mathrm{~cm} ; 7000 \mathrm{~cm} \)** - \( 7.0 \mathrm{~cm} \) has **2 significant figures** (the zero after the decimal point counts). - \( 700 \mathrm{~cm} \) has **1 significant figure** (unless specified otherwise, trailing zeros without a decimal point are not counted). - \( 7000 \mathrm{~cm} \) also has **1 significant figure** (for the same reason as above). The most precise measurement in this set is **\( 7.0 \mathrm{~cm} \)**. 2. **Set 2: \( 30 \mathrm{~cm} ; 30 \mathrm{~m} ; 32 \mathrm{n} \)** - \( 30 \mathrm{~cm} \) has **1 significant figure** (unless specified otherwise, trailing zeros without a decimal point are not counted). - \( 30 \mathrm{~m} \) also has **1 significant figure** (for the same reason as above). - \( 32 \mathrm{n} \) has **2 significant figures**. The most precise measurement in this set is **\( 32 \mathrm{n} \)**. In summary: 1. The most precise measurement is **\( 7.0 \mathrm{~cm} \)**. 2. The most precise measurement is **\( 32 \mathrm{n} \)**.