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## Wednesday, December 14, 2011

### Patricia's Textbook Questions 4,7,4

Page 148

4) Chris purchased the following items:

• 2 binders for \$4.99 each

• 1 math set for \$3.99

• a backpack for \$19.99

Find the total cost including 5% GST and 7% PST.

1- 4.99x2+3.99+19.99=33.96

2- 0.12x33.96=4.08

3- 4.08+33.96=38.04

Page 149

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.

1- o.10x100=10

2-100+10=110

3-0.20x110=22

4-110+22=132 caribou

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

Because increase is not 30%, the 20% increase in the second year and the 10% increase in the first year.

Page 150

4) How many hundred grids are needed to show each of the following percents?

a) 101% b) 589% c)1450%

For a: you will need 2 hundred grids.

For b: you will need 6 hundred grids.

For c: you will need 15 hundred grids.