Answer: D. 64 First step is substituting the x with -3. This will be turn the original, f(-3)= 0.5^(x-3) Into f(-3)= 0.5^(-3-3) F(-3)= 0.5^(-6) Multiply 0.5 by itself by -6 times. This will then be simplified into 64, making it your answer. F(-3)= 64
