dentify the numbers in each of the following statements as measured or exact: a. A patient has a mass of 67.5 kg.

Measured numbers are values obtained through measurement and are subject to uncertainty. They include a degree of precision based on the measuring instrument used. For example, the mass of a patient measured as 67.5 kg indicates that the measurement is precise to one decimal place, but it may not be exact due to potential variations in the measurement process.

Exact numbers are values that are counted or defined and have no uncertainty associated with them. They are considered to have an infinite number of significant figures. Examples include the number of students in a classroom or defined quantities like 1 meter = 100 centimeters, where the values are exact and not subject to measurement error.

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Understanding significant figures is crucial for interpreting measured numbers, as they indicate the reliability of the measurement and help in determining how to report results accurately.