## Friday, November 13, 2009

### How to stop an Alien Invasion using Proportion

One day, I was playing outside on the swings with my cousin late at night in my backyard. All of a sudden, there were moving lights in the sky. It was a UFO! They came closer and closer to me, and finally landed in my backyard. My cousin and I were really scared. They said that they will take me, and make me live in their planet if I don't answer 3 proportion questions.

These were the questions:

1. Set up a proportion for each situation.
a) If 10 beans have a mass of 17 g, then 30 beans have a mass of 51 g.

b) There are 13 boys for 15 girls in every classroom at Albany Middle School. If there are 65 boys in the school, then there are 75 girls.

c) On a map, 1 cm represents 25 km. Kendra wants to ride her bike 160 km. This distance is 6.4 cm on the map.

2. Two quarters have the same value as ten nickels. What is the value of five quarters in nickels?
- The value of 25 nickels is 5 quarters which is \$1.25.

3. An amusement park, a new thrill ride was introduced. It costs \$7.50 for 3 rides on the Wild Slider.

a) What is the Wild Slider's unit rate per ride?

b) At this rate, what would it cost for 18 rides on Wild Slider? Determine the answer two different ways.

After I answered these proportion questions, the aliens left, and I ran back into my house, safe and sound.

#### 1 comment:

×Jusŧıŋ£8-17× said...

goood job , you did a good job with the colours .