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Answer: B
Step-by-step explanation: put the points on a graph
Given:
The power generated by an electrical circuit (in watts) as function of its current x (in amperes) is modeled by:

To find:
The current that will produce the maximum power.
Solution:
We have,

Here, leading coefficient is negative. So, it is a downward parabola.
Vertex of a downward parabola is the point of maxima.
If a parabola is
, then

In the given function, a=-12 and b=120. So,



Putting x=5 in the given function, we get




Therefore, 5 watt current will produce the maximum power of 300 amperes.
159.2 or 159 1/5 If you need it as a fraction
Answer:
The width of the rectangle is 3 and the width is 9. Those are reasonable measurements.
Step-by-step explanation: