A rectangular, $450 \mathrm{ft}^{2}$ family room addition is to be built using the existing house for one of its walls. Find a function $\mathrm{f}(\mathrm{x})$ that would represent the total length of the other 3 walls that need to be built, where $x$ represents the length of the wall that will be parallel to the existing wall.
A) $f(x)=2 x+\frac{900}{x}$
B) $f(x)=x+\frac{450}{x}$
C) $f(x)=x+\frac{900}{x}$
D) $f(x)=3 x-\frac{450}{x}$

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The Answer of A rectangular, $450 \mathrm{ft}^{2}$ family room addition is to be built using the existing house for one of its walls. Find a function $\mathrm{f}(\mathrm{x})$ that would represent the total length of the other 3 walls that need to be built, where $x$ represents the length of the wall that will be parallel to the existing wall.
A) $f(x)=2 x+\frac{900}{x}$
B) $f(x)=x+\frac{450}{x}$
C) $f(x)=x+\frac{900}{x}$
D) $f(x)=3 x-\frac{450}{x}$

A Rectangular 450ft2450 \mathrm{ft}^{2}450ft2 Family Room Addition Is to Be Built Using the Existing

A Rectangular $450 \mathrm{ft}^{2}$ Family Room Addition Is to Be Built Using the Existing