The 2020 census claimed a U.S. population of 331,449,281 on April 1, 2020. According to the U.S. Geological Survey, the land area of the United States is 3,531,005 square miles ($mi^2$). Dividing the population by the area, we find that the population density of the country is 93.86825592 people/$mi^2$. Use the given information to complete parts (a) through (c) below.
a. Discuss the possible sources of error in this calculation.
Both the population and area are subject to \text{ } errors and are stated with \text{ } precision.
b. State the population and land area with the precision you think are justified.
A reasonable precision for the population is \text{ } people.
A reasonable precision for the land area is \text{ } $mi^2$.
c. Give an estimate of the population density that you think is reasonable.
A reasonable estimate of the population density is \text{ } people/$mi^2$.
(Type an integer or a decimal. Type your answer using the appropriate number of significant digits.)
