Tuesday, February 2, 2010

Scribepost for Feb. 2

Questions 7 & 11

7. A herd of 100 caribou was moved to a new location. The population increased by 10% the first year and then increased by 20% the second year.

A. Find the population after the second year.

- 100/10 = 10%
100+10 = 110
110/10 = 11x2 = 22
22 = 20%110+22 = 132

There will be a population of 132 caribous.

B. Explain why there was not a 30% increase in population over the two years.

The increase is not 30% because the 20% increase is based on the population after 10% increase in the first year.

11. A student is awarded a $1000 scholarship and places it in an account that pays 3% simple interest per year.

A. What is the total value of the scholarship amount at the end of the second year?

- 1000/10 = 100
100/10 = 10
10x3 = 30
30 = 3 %
1000+30 = $1030
1030/10 = 103
103/10 = 10.30
10.30x3 = 30.90
30.90 = 3 %
1030+30.90 = $1060.90


The total value of the scholarship is $1060.90

B. What is the single percent increase in value of the scholarship after two years?

- 3% = 30
30+3% = 30.90
60.90/10 = 6.09%

The single percent increase is 6.09%

Percent Videos : (Sorry, the video wouldn't upload, so here's the URL instead.)

http://www.ustream.tv/recorded/4299648
http://www.ustream.tv/recorded/4149145

4 comments:

april817 said...

Good Job Darlene! Your scribe was neat. Good use of colors. Although I don't think we can put 2 equal signs on the same line.. I'm not sure. And also maybe you could have used some ratio tables. Other than that, well done and good explanations.

Larrisa8-17 said...

Good job Darlene ! your scribe was good, I liked how you used colors, also you should add pictures like ratio tables. well Good Job again (:

×Jusŧıŋ£8-17× said...

indeed. good job Darlene! nice scribe, next time try adding pictures of your work, ggood job on the colours too btw, nice/.

Layton 8-17 said...

Good job! youhad colour an explain how you got your answer.. good job

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