Problema Solution
If the area of a square deck is 400 square feet, what is the length of one side?
Answer provided by our tutors
let 'a' be length of the side of the squared deck, and a >0
the area of a square is calculated by the formula A = a^2
the area of a square deck is 400 square feet
a^2 = 400
|a| = 20 and since a > 0 we have
a = 20 ft
the length of the side is 20 feet.