The answer is 64.4 because you multiply 92 times 0.7 and get 64.4
Step-by-step explanation:

To reduce fraction we have to divide numerator and denominator by the same number. We can repeat operation few times.
Lets do this

- its the most reduced form. We cant divide 7 and 20 by the same number to not obtain number with coma. (because 7 is prime number so can be divided only by 1 and by 7)
Answer:
Only
is a perfect cube.
Step-by-step explanation:
is not a perfect cube because 8 is not a multiple of 3.
Now,
is a perfect cube since 24 is a multiple of 3.
So,
can be expressed as
Again,
is not a perfect cube as 28 is not a multiple of 3.
And also
is not a perfect cube as 64 is not a multiple of 3.
Therefore, only
is a perfect cube. (Answer)