## Saturday, December 12, 2009

### Runcel's %%%%%% rate growing post

Ratio- means a 2 or more quantities measured in same units.
Rate-
means 2 quantities measured in different units.

What is the difference between the ratio and the rate.

the difference between the both of them is they compare units in different ways.

Page 60. #9
Mala is shopping for honey. Her favourite brand is available in two sizes.

The Big jar is the better buy.

Question 12 page.61

12. The rate at which glaciers melt is increasing globally. The Saskatchewan Glacier near Banff has receded 1.5 km in the last 75 years. The Peyto Glacier receded 1320 m from 1923 to 1993. Which glacier had the greater annual rate of melting?

Saskatchewan glacier melts 0.02 km in the last 75 years.

1500 m /75 year= 20 m/year;

The Peyto Glacier receded 1320 m from 1923 to 1993. Which glacier had the greater annual rate of melting?

It didn't say how many years did 1320m receded here is how you get it, subtract 1993 by 1923 together you get 70 years!!! Peyto Glacier: 1 320 m/70 year= 18.86 m/year.

The Saskatchewan glacier has the greater rate of melting.

1) What would the recipe look like if it had to serve 10 people? Show your calculations.
so if these is a recipe for 4 people and if you multiply it by 2.5 you will get 10

2) What would the recipe look like if you had to only serve 1 person? Show your calculations.
10 divide it by 10 = 1.