orlondraw orlondraw
  • 02-10-2017
  • Mathematics
contestada

Which expression is a perfect cube? A.x^8 B.y^24 C.m^28 D.s^64

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babydoll033003
babydoll033003 babydoll033003
  • 02-10-2017
B is your answer because when you take 24/3=8 but when you take 8/3 or 28/3 or 64/3 you will get a decimal. 
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kritter1
kritter1 kritter1
  • 02-10-2017
The answer is A

Try breaking down each solution into cubic form.

A) a^8 = ((a^2)^3) (perfect cube because 2 is a prime number)

B) a^24 = (((a^2)^3)^2) (not a cube because of the 2)

C) a^28 = ((a^2)^2)^7 (not a cube because of 7)

B) a^64 = (((a^2)^32) (not a cube since 32 is not a factor of 3)

Hope I helped :)
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