4 km - 280 m
what is the answer

Look at step-by-step

Step-by-step explanation:

Either 120 m or 1.2 km

3.72 kilometers

Step-by-step explanation:

just subtract man

Domain is the set of the values of x (produced units) that are feasible. Which is all the positive integer values and zero.

Range is the set of possible results for c(x), i.e. possible costs.

You can substitute some values for x to help you, for example:

x      y

0    200

1    200 -7 +0.345 = 193.345

2    200 - 14 + 0.345 (4) = 187.38

3    200 - 21 + 0.345(9) = 182.105

10  200 - 70 + 0.345(100) =164.5

11 200 - 77 + 0.345(121) = 164.745

The functions does not have real roots, then the costs never decrease to 0.

So the function starts at c(x) = 200, decreases until the vertex (x =10, c=164.5) and then starts to increase.

Also, the range goes to 164.5 to infinity, limited to the solution for x = positive integers.