Question

A grassland had ​7

red maple trees in the year 2010
. Each year the number of red maple trees increased seven times as compared to the year before till 2014
. In 2015
and 2016
the number of trees doubled each year as compared to the previous year. What is the amount of trees at the end of 2016?

Answer 1

Answer: Let's calculate the number of red maple trees at the end of each year from 2010 to 2016.

Year 2010: 7 red maple trees

From 2010 to 2014, the number of trees increased seven times each year:

Year 2011: 7 * 7 = 49 red maple trees

Year 2012: 49 * 7 = 343 red maple trees

Year 2013: 343 * 7 = 2401 red maple trees

Year 2014: 2401 * 7 = 16807 red maple trees

In 2015 and 2016, the number of trees doubled each year:

Year 2015: 16807 * 2 = 33614 red maple trees

Year 2016: 33614 * 2 = 67228 red maple trees

So, at the end of 2016, there are 67228 red maple trees in the grassland.