Solve the Problem $x=a . f(x)=x^{2}+3 x, a=5$
A) -10
B) 15
C) 10
D) 13

Multiple Choice

Solve the problem.
-Compute the instantaneous rate of change of the function at at $x=a . f(x) =x^{2}+3 x, a=5$ .

A) -10
B) 15
C) 10
D) 13