ANSWER
B. A(x)=0.5 (f .g)(x)
EXPLANATION
The area of a triangle is calculated using the formula:
Area=0.5 Base × Height
The base is given by
g(x)=2x
and the height of the function is
[tex]f(x)= {x}^{2} + 3[/tex]
This implies that:
A(x)=0.5f(x) × g(x)
A(x)=0.5 (f .g)(x)
