1. The average respiratory rate for an adult is 16 breaths per minute. About how many times does an adult breathe in one week? A year? (Hint: 1 week \( =7 \) days; 1 year \( =365 \) days)

**Step 1. Calculate the number of minutes in one week** There are \(60\) minutes in an hour, \(24\) hours in a day, and \(7\) days in a week. Thus, the total number of minutes in one week is calculated by: \[ 60 \times 24 \times 7 = 10080 \text{ minutes} \] **Step 2. Calculate the number of breaths in one week** An adult breathes at an average rate of \(16\) breaths per minute. Therefore, the total number of breaths in one week is: \[ 16 \times 10080 = 161280 \text{ breaths} \] **Step 3. Calculate the number of minutes in one year** There are \(60\) minutes in an hour, \(24\) hours in a day, and \(365\) days in a year. Thus, the total number of minutes in one year is: \[ 60 \times 24 \times 365 = 525600 \text{ minutes} \] **Step 4. Calculate the number of breaths in one year** Using the average breathing rate of \(16\) breaths per minute, the total number of breaths in one year is: \[ 16 \times 525600 = 8409600 \text{ breaths} \] **Final Answers:** - In one week: \(161280\) breaths. - In one year: \(8409600\) breaths.