Answer:
c
Step-by-step explanation:
7x8=56
He works 7 hours a day, so for each hour Howard earns 8$. 7hoursx8$ per hour=56$ for 7 hours
Answer: negative 1 minus another negitive 1 give you zero/X
Step-by-step explanation:
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.