Christmas is near!

This blog is meant for Monday, December the 1st. Christmas is near! Woo- hoo!! Today we did mental math and corrected the questions that were for homework last Thursday. The following are the answers to the questions 3, 4 & 15 on the sequences review booklets.

#3. A wedding cake has square layers that are 3 inches tall. Each layer's side length is half as long as the length of the layer below it. If each side of the base layer is 12 inches long, use sequences to calculate the volume of a cake with 4 layers.

#4. A study revealed that in January 2001, 5000 people in town used the internet. Each year, this number is influenced by the following: the number of internet users is increased by 2.5% and 100 people cancel their internet service.
Determine the number of people that will use the internet in this town by January 2006. Show how you arrived at your answer.

#15. On a murky island there is bear population of 400. Each year, 12% of the bear population dies. Each spring an average of 56 bear cubs are born.
a) Determine the bear population each year over the next 5 years. Show your work.
b) What will the bear population be after it stabilizes?
c) Construct a population graph of the sequence extending the x- axis to include the first 50 years. Label the graph.
d) Devise a plan to stabilize the bear population between 400 to 450 bears (inclusive) by the 50th year.
For the answer to this question Mr. Maks showed us the website that generates an answer for you.
Go to this link for similar questions. http://www.shodor.org/interactivate/activities/Sequencer/?version=1.6.0_03&browser=MSIE&vendor=Sun_Microsystems_Inc..