trulyreddp993kl trulyreddp993kl
  • 25-05-2018
  • Mathematics
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i neeed heeeelpp im not sure wich one it is

i neeed heeeelpp im not sure wich one it is class=
i neeed heeeelpp im not sure wich one it is class=

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altavistard
altavistard altavistard
  • 25-05-2018
A) because the decimal is repeating, 625.49 is irrational.
B) because 625.89 can be written as the ratio of two integers, 62589 and 100000, this is a rational number.
C) sqrt(90) can be factored:  sqrt(9)*sqrt(10).  sqrt(9) = 3 (rational), but sqrt(10) is irrational.  Thus sqrt(90) is irrational.
D)  You try this one yourself, OK?
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