Chapter 4: Applications of Derivatives - Practice Exercises - Page 243: 16

See explanations.

Step 1. Given $F'(x)=3$, we can find its general antiderivative as $F(x)=3x+C$, where $C$ is a constant. Step 2. There will be an unlimited number of functions whose derivative is $3$; this is because $C$ can be any constant.