In a museum there is a round window decorated with circular rings of the same size as in the diagram. The radius of the window is 45cm. Calculate the area that is not covered by the decoration. (Use pi=3.142)

sorry, i'm new here and i'm just trying to figure this out. try quizlet. rate 5* you!

squares, rhombus, rectangles

a 270° rotation about point p says on e d g e n u it y (had to space it out because it says it's a misspelling so i couldn't submit it

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answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

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