20x20=400 40x10=400 5x80=400 2x200=400 1x400=400
30% of 400 = 30% * 400 = 0.3 * 400 = 120
yes, 400 + 400 is 800
400
29% of 400= 29% * 400= 0.29 * 400= 116
hiest of squeroot
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400
400
400
400
400
400
400
400
400
It is 400