Answer: B. 8.
Step-by-step explanation:
The given function is : [tex]f(x)= 2^x[/tex]
Here , x= independent variable where we place the input value and f(x) = dependent variable where we get the output value.
Now , when we put x= 3 , we get
[tex]f(3)=2^3= 2\times2\times2=8[/tex]
That means , the value of f(3) in the given function is 8.
Hence, the correct answer is B. 8.
