Answer:
Fifty years of effort by suffragists secured approval of the Nineteenth Amendment.
Explanation:
Rule of 70 can be used to determine a population’s doubling time which is a measure of growth rate.
<h3>What is Growth rates?</h3>
Growth rates is the percentage change of a specific variable such as population in particular period.
Therefore, With regards to the Rule of 70, the growth rate is a big variable in measuring the increase in population at that particular region.
Learn more about Growth rates at;
brainly.com/question/20115298