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 m²
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?
a = lxw
a = 18x18=324 cm
a= 324 cm²
b) What is the area of the board?
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: