How many years after the analysis of survey data?

Looking at the national entrance examination in recent years, it is not difficult to find that in data analysis, almost every time you get a topic related to the growth rate, one of which is a headache for the majority of candidates in understanding, formulation and calculation. Therefore, this paper will sort out and summarize the formulation and solution of the topics related to the average annual growth rate.

(1) Difference between average annual growth rate and average growth rate

Many people tend to confuse the average annual growth rate with the average growth rate. It is easy to understand by giving a specific example. Suppose that after n years, the base period quantity A becomes the current quantity B, with an average annual growth rate of R.

(B) the average annual growth rate of specific issues

1, average annual growth rate-current amount every other year.

A province's tourism revenue this year is 3.98 million yuan, if the average annual growth rate is 30.4%. So eight years.

What is the income from tourism in this province after this year?

A.3.6 B.6.4 C.7.8 D.8.4