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3 years ago

Which number produces a rational number when multiplied by 0.5

Mathematics

2 answers:

defon3 years ago

5 0

B.
Rational is defined as being able to write it as a fraction. 2.22/ 2 = 1.11 which is 1 11/100

jok3333 [9.3K]3 years ago

5 0

A rational number can be written in form form a/b where a and b are integers and b≠0

remember that a rational number times an irrational number=irrational

irrational numbers can't be in a/b form

so

A. pi doesn't work, that's irrational
B. this works, we can say 2.22=222/100, when multplied by 0.5, we get 111/100 which is still rational
C. nope
D. we can write this as 2000/999 so it is rational, when multiplied by 0.5, we get 1000/999 which is still rational

answers are B and D

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