University Of Central Florida (UCF) CHM2045C Chemistry Fundamentals I Practice Exam 1

When discussing precision in measurements, it is essential to consider the number of significant figures present. The measurement that has the highest degree of precision will have more significant figures, indicating a more exact value. In this case, the measurement of 30.00 m has four significant figures, which means that it conveys a higher level of precision compared to the other choices. The two decimal places suggest that the measurement is accurate to the hundredths place, providing a clear indication of how finely the measurement was taken. In contrast, the other options have fewer significant figures; for example, 30 m has only two significant figures, and 30.0 m has three significant figures. The option of 300 m further decreases precision since it could represent anywhere from 290 m to 310 m depending on rounding, with only one significant figure, indicating the least precise measurement among the choices. Thus, the measurement of 30.00 m stands out as the most precise option due to its four significant figures, demonstrating a careful and accurate measurement.