Can someone me with this problem:

write an expression for each situation.

b. the area of a square with the side length s

s(s)

To find area you multiply two opposing sides. For a square, all the sides are the same, so if one side is 2; you would multiply 2(2) to get the answer. This is why if a side length is s, the expression to 'solve' this woulf be s(s)