If n is the number (not the value) of quarters received, then n cannot take values which are fractions and n cannot take negative values. Its values have to be non-negative integers. (Note that 0 is possible.)
<span>That eliminates the descriptions in answers a, b, and c, leaving only answer </span> <span>d ( 0,1,2,3,...) </span> <span>as a possibility. Since it describes the non-negative integers, it's the correct one.</span>
First, a square's diagonal is basically the hypotenuse of a 45-45-90 triangle. a 45-45-90 triangle has a really special relationship, where the side length is x, and the diagonal is x . So, the side length is 15.
