Friday, December 11, 2009

three questons from the text book

Question 15
Evaluate:
square root of:
a)49=7
b)64=8
c)652=25.2

To get all those answers, I simply used my calculator.


Question 16
Evaluate:
Square root of:
a)9=3
b)25=5
c)1600=40

Again to get those answers, I used my calculator.


Question 23
A helicopter landing pad has a square shape. The area is 400m squared. Use Prime factorization to fine the side length of the pad.

400
=200 x 2
=100 x 2 x 2
=50 x 2 x 2 x 2
=25 x 2 x 2 x 2 x 2
=5 x 5 x 2 x 2 x 2 x 2
400 = (5x2x2) x (5x2x2)
400 = 20 x 20
400 = 20 squared

1 comment:

×Jusŧıŋ£8-17× said...

good job but you should have showed people how you used the calculator . what you press and what sign does is look like ??

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