in 2017, the united states had a population of 320 million people, a crude birth rate (cbr) of 11.8 and a crude death rate (cdr) of 8.5. the net migration rate (the difference between the number of persons entering and leaving a country during the year per 1,000 persons) was 3.9 per 1,000 people. use the formula below to calculate the national population growth rate for the united states in 2017. show your work and clearly label each step.

Growth rate is a metric for determining how quickly a variable has changed over time. It is usually represented as a percentage and is frequently used to calculate the rate of change in economic indicators such as GDP or the rate of inflation. Growth rate may also be used to quantify the rate of change in biological or population processes, such as the growth of an organism's population or the expansion of the size of a tumour. In general, a high growth rate is positive and indicates that a variable is increasing quickly, whereas a low growth rate is considered negative and suggests that a variable is increasing more slowly or may even be decreasing.

How to solve?

Population growth rate = (CBR - CDR + net migration rate) / 10

Population growth rate = (11.8 - 8.5 + 3.9) / 10

Population growth rate = (11.8 - 8.5) + 3.9 / 10

Population growth rate = 3.3 + 3.9 / 10

Population growth rate = 3.3 + 3.9

Population growth rate = 7.2 / 10

Population growth rate = 0.72 %

Therefore, the national population growth rate in the United States in 2017 was 0.72%.

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