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Sunday, January 22, 2012

Joseph's Textbook Questions




10.Kai uses an entire can of paint on a square backdrop for the school play. The label on the can states that one can covers 27m squared of wall surface. Estimate the backdrop's side length, to one decimal place.











Answer: 5.1



13. Stella is planning an outdoor wedding. She would like a square dance floor with an area of 115m squared.











a)Determine the side length of the dance floor, to the nearest tenth of a metre





b) Stella finds our that the dance floor will be made up of floorboards that each measure 1cm squared. What are the 2 side lengths the dance floor can have that are closest to what she wants?





c)Which area will Stella choose?Explain



b)






c)121 is closer because it is much closer to 115m squared.





16. A fitness centre will install a square hot tub in a 6m x 6m 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?
b) What dimensions, to a tenth of a metre will the fitness centre order from the manufacturer?Explain




a) 27

















b)5.1 If u square root 27 you will get 5.1

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