Step-by-step explanation:
Given:
and 
We can solve for f(x) by writing

Let 

Then


We know that f(0) = 0 so we can find the value for k:

Therefore,

I need to type and make this 20 characters long but here you go
Answer:
I'm pretty sure that is correct. 3 non collinear points always form a triangle.
Answer:47.1 in
Step-by-step explanation:
3.14*15=47.1 in