Question

A rectangle has a length represented by the function f (x) = x and a width represented by the function g (x) = x + 3 where both functions are in feet.

Calculate (f · g) (æ) and state what it represents.

(1 point)

O (f .g) () = 4x + 6; It represents the perimeter of the rectangle in feet.

O (f .g) (z) = z2 + 3x; It represents the area of the rectangle in square feet.
O (f.g) (z) = z2 + 3x; It represents the perimeter of the rectangle in feet.

O (f . g) (z) = 4x + 6; It represents the area of the rectangle in square feet.

Answer 1

(f · g)(x) = f(x)·g(x) = x(x + 3) = x^2 + 3x.

This represents the area of the rectangle, in square feet.