Hi there!
Let's solve this problem step by step!

To find f(3) we must substitute x = 3 into the formula.

Now we use PEMDAS (Parenthesis, exponents, multiply, divide, add, subtract) to find our answer.
Work out the exponents inside the parenthesis first.

And finally multiply.

Hence, the answer is D. 64.
~ Hope this helps you!
Answer:
A
Step-by-step explanation:
Answer: true
Step-by-step explanation: f(x) is a function because each x value (left oval) has one y value (right oval)!

now, the one below that, which is equivalent to that? well, just look above it
Step-by-step explanation:
Let the required number be n

NOTE: A number is always 100% in itself.