Question

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

Answer 1

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.