Consider the set A of all integers from 0 to 399 inclusively; all numbers are written in three-digit format (so instead of 0 we write
000, instead of 17 we write 017 etc.). Two distinct numbers from A
are said to be neighbors if they differ at exactly one place (so 007
and 017 are neighbors because they differ at exactly one place, the
tens place). What is the maximum number of different numbers
from A such that no two of them are neighbors?

you need to give us more information since we can't answer

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32