Answer:
Option a:
Step-by-step explanation:
1. By definition can be written as .
2. Then, keeping this on mind, you have that can be also written as following:
3. Therefore, the rational exponent expression of is the option a:
Domain is the sex of x values that are feasible. this is all of the positive integer values + 0, in case you only consider that can produce whole units.
range is the set of possible results for c(x), possible costs.
you can derive this from the fact that c(x) is a parabole and you can draw it, for which you can find the vertex of the parabola, the roots, the y intercept, the shape. also limit the costs to be positive.
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 + .345(4) = 187.38
3 200 - 21 + .345(9) = 182.105
the function does not have real roots, then the costs never decrease to 0.
the function starts at c(x) = 200, decreases until the vertex, (x = 10, c = 164.5) and starts to increase
then the range goes to 164.5 to infinity, limited to the solution for x = positive integers.
Minus 5 from both sides so we have 3a=-19 now divide both sides by 3 so we have a=-6 1/3
The answer would be C. The change of Velocity over time. :)
Roughly 4 seconds after the initial 4 second head start, so she would take 8 seconds to catch up.