Question

f(n) = n + 3 g(n) = n² + 4 Find f(4) x g(4)A. -20B. 10C. 140D. -6

Answer 1

Answer:

C. 140

Explanation:

Given f(n) and g(n) defined below:

$\begin{gathered} f\mleft(n\mright)=n+3 \\ g\mleft(n\mright)=n^2+4 \end{gathered}$

First, evaaluate f(4) and g(4):

$\begin{gathered} f\mleft(4\mright)=4+3=7 \\ g\mleft(4\mright)=4^2+4=16+4=20 \end{gathered}$

Therefore:

$\begin{gathered} f(4)\cdot g(4)=7\times20 \\ =140 \end{gathered}$

The correct choice is C.