20 x 20 = 400
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20 cubed cubed = [203]3 = (20 x 20 x 20)3 This equals 20 x 20 x 20 x 20 x 20 x 20 x 20 x 20 x 20 which = (20)9 The rule to work it out is:multiply the two exponents ie 3 x 3 = 9 206 is 20 x 20 x 20 x 20 x 20 x 20 which is obviously less than 209. See: http://oakroadsystems.com/math/expolaws.htm#WhatsNew#WhatsNew
204 = 20 x 20 x 20 x 20 = 160000
x % of 80 = 20 = x / 100 x 80 = 20 = 8 x / 10 = 20 = x = 20 x 10 / 8 = x = 25% (answer)
x-6-x-4=10-x -10=10-x -20=-x x=20 check: 20-6-20-4=10-20 -10=-10√
20 of 20 = 20 x 20 = 400 20% of 20 = 0.2 x 20 = 4