Patricia`s textbook questions

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


19 Estimate the square root of 160 100. Explain how you determined your estimate

160=40
100=10
40x10=400

17 Carmel want to mount an 18cm by 18cm square on a square board that is four times the area of the picture.

a) What is the area for the picture.
18x18=324cm2
b)What is the area of the board
324x4=1296cm2
c)What are the dimensions of the board.
1296=36cm