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-4 is less than -5 even though they are both on the same side of the number line. -4 is closer to zero.
A blue whale weighs more than an African elephant by 111.5 tons
African elephant= 15,000/2,000= 7.5 tons
Blue whale weighs 238,000/2,000=
119 tons
119-7.5 = 111.5 tons
Yes I believe it does refer to os