If 0.5893 is expressed in the form 5.893 × 10n, what is the value of n ?
can anyone explain this one?

In the scientific value of 5.893 x 10n. The standard value is 0.00005893 what is n? To better illustrate this phenomenon, we can explain it further under the rules of scientific notation.
For example.
1.  3 x 10^3 = 3 x 100 = 300
2.  3 x 10^-3 = 3 x 0.001 = 0.003

Solution:
0.00005893 = 5.893 x 0.00001 = 5.893 x 10^-5  
n= ^-5

There is no association.