SOLUTION: The power, P watts, supplied to a circuit by a 9-V battery is given by the formula p = -0.51^2 + 91, where I is the current in amperes. (Amperes is just the units for the current,

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The power, P watts, supplied to a circuit by a 9-V battery is given by the formula p = -0.51^2 + 91, where I is the current in amperes. (Amperes is just the units for the current,       Log On


   

Question 1169387: The power, P watts, supplied to a circuit by a 9-V battery is given by the formula p = -0.51^2 + 91, where I is the current in amperes. (Amperes is just the units for the current, just like a length is in cm)
a)Graph the function.
b)For what value of the current with the power be a maximum?
c)What is the maximum power?
Answer by Solver92311(821) About Me  (Show Source):
You can put this solution on YOUR website!


b) Set the first derivative of the function equal to zero and solve for I.

c) Find the value of the function for the value of I from part b)


John

My calculator said it, I believe it, that settles it

From
I > Ø