Since you know the value of s, you can substitute/plug it into the equation to find A:
A = 18s² Plug in 1/3 into "s" since s = 1/3
Find (1/3)²
A = 2 square inches
Answer:
35% of 15=35/100×15=21/4=5.25
all we can really cancel is one of the (x-5) and the "x", is all.