Answer:
-142
Step-by-step explanation:
So we have the function:

To find f(9), substitute x for 9:

Square the first term and multiply the second:

Add:

And that's our answer :)
Answer: The top one
Step-by-step explanation:
Because there can only be one input for one output. (X’s can’t repeat)
That means that there is a mountain in Alaska that is 20,300 ft high!
Check the picture below.

now, that's just the radius of the pool, the diameter would be twice as much, or 2r.