Answer:
B. 64/3
Step-by-step explanation:
f(x)= (1/3)*4^x
Whenever given an f(x) equation and a number is in the place of x, simply replace all x’s in that equation with the given number
f(3)= (1/3)*4^3
1) Complete the exponent
4^3 = 64
(1/3)*64
2) Multiply :)
= 64/3
Hope this helps!