Darnell used one small can of polyurethane to seal a square patch of his hardwood floor. The can advertised coverage of 50 square feet. What is the approximate side length of the square Darnell sealed?

a)7 feet
b)8 feet
c)25 feet
d)49 feet

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Square root of 50 = 7.1

To find the approximate side length of the square Darnell sealed, we need to determine the area that the small can of polyurethane can cover and then find the square root of that area.

The can advertised coverage of 50 square feet, which means it can cover an area of 50 square feet. Let's assume the side length of the square is "x" feet.

The area of a square is calculated by multiplying the length of one side by itself. So, the area of the square is x * x = x^2 square feet.

We know that the can can cover an area of 50 square feet, so we can set up the equation:

x^2 = 50

To find the approximate side length, we take the square root of both sides of the equation:

√(x^2) = √50

x ≈ √50

x ≈ 7.07

Since we are looking for the approximate side length in feet, and considering the answer choices provided, we can conclude that the approximate side length of the square Darnell sealed is approximately 7 feet.

Therefore, the correct answer is option a) 7 feet.