Tuesday, November 9, 2010

Chelsea's Estimating Square Roots

Pg. 100, 16--17

16. Q: A tub in a fitness centre will install a square hot tub in a 6 m × 6 m room. They want the tub to fill no more than 75% of the room’s area.

a) What is the maximum area of the hot tub?

The max. area of the hot tub is 27 m

b) What dimensions, to a tenth of a metre, will the fitness centre order from the manufacturer? Explain.

The dimensions should be 5.1 m, so that the hot tub will not exceed the limit of 75% of the room's space.

17. Q: Carmel wants to mount an 18 cm × 18 cm square picture on a square board that is
four times the area of the picture.

a) What is the area of the picture?

324 cm

a = lxw
a = 18x18=324 cm
a= 324 cm

b) What is the area of the board?

² cm2

You multiply the area by 4 to get this number.

c) What are the dimensions of the board?

36 cm x 36 cm

Here's a link that I found about estimating square roots. If anyone has another or a better link that I should use, please comment and I will be sure to use it!

Here's a video to help you guys with estimating square roots:


  1. Nice post Chelsea. Good use of color and your work looks very organized. I also like the video and the link you added. Next time add a picture to make your post more appealing. Other than that, great job.

  2. Good job, Chelsea! I liked that you used different colours and that you put a video!

  3. Good Job, Chelsea. I like the colors and the video very helpful. Your work is ver organized, easy to read.Good Job!

  4. Great job Chelsea, I liked that you have the right amount of colors on you blog to make it neat. I also liked the you have the answers for the questions.

  5. Good job Chelsea! You took your time and added a video and link, but next time you should add a picture.

  6. Good job, Chelsea. I liked how you explained your post with color, video and a link. Next time, add a picture. But other than that, you did a great job.

  7. Good Job, adding picture would be helpful.