if n = 4, all of the following expressions are equivalent except

16
1/n^2
1/16
n^-2

1/(4^2)=1/16
1/16=1/16
4^-2=1/(4^2)=1/16
16≠1/16

answer is 16

N^-2 = 1/n^2
If n = 4
n^-2 = 1/n^2 = 1/4^2 = 1/16

Therefore, all the expressions are equivalent except 16.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

If there are four friends then each would get, 1.25 or 1 1/4. so this is how i solved 5 ÷ 4 = 1.25 . hope this ; )