#12, what is this answer ?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

50 points and will mark brainlest if you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking: