Given:
The power generated by an electrical circuit (in watts) as a function of its current x (in amperes) is modeled by

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


Differentiate with respect to x.

...(i)
To find the extreme point equate P'(x)=0.


Divide both sides by -30.

Differentiate (i) with respect to x.

(Maximum)
It means, the given function is maximum at x=4.
Therefore, the current of 4 amperes will produce the maximum power.
the two triangles are congruent
step 2 i believe is the answer
Answer:


Step-by-step explanation:
Let


Currently:

Two years ago

Required
H and B
We have:

Open bracket

Add 2 to both sides


Substitute 

Collect like terms


Substitute
in 


