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15 July, 05:12

Susans red note book cover is 20 cm by 30 cm she has a sticker for each letter in her name each sticker is a square that measure 3 cm on each side she puts all 5 sticers on her notebook. how much of the red notebook cover is still showing

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  1. 15 July, 05:25
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    That would be (20*30) - (3*3*5) = 555 cm^2 of the cover is red

    This is 555/600 = 0.925 = 92.5% of the cover is red.
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