Mrs. Black has one begonia plant. If she buys two begonia plants each year for every one she has, how many will she have in four years?
Please explain the answer.
1st year she bought 2..1 times 2 is 2
2nd year she bought 6..3 times 2 is 6
3rd year she bought 12..6 times 2 is 12
4th year she bought 24...12 times 2 is 24
The answer is she bought 24 plants in 4 yrs!!!
well my teacher read the book and she says 27.
im pretty sure that was wrong though cuz when i did the math i got 36 unless 9 died. lol
To calculate the number of begonia plants Mrs. Black will have in four years, we need to determine the growth pattern based on the information given.
Initially, Mrs. Black has one begonia plant. For every one plant she has, she buys two more each year.
Let's break it down year by year:
Year 1: Mrs. Black has 1 begonia plant.
Year 2: She buys 2 begonia plants for the one she has, resulting in a total of 1 + 2 = 3 plants.
Year 3: She buys 2 begonia plants for each of the 3 plants she has, resulting in a total of 3 + (2 * 3) = 9 plants.
Year 4: She buys 2 begonia plants for each of the 9 plants she has, resulting in a total of 9 + (2 * 9) = 27 plants.
Therefore, in four years, Mrs. Black will have a total of 27 begonia plants.