The power generated by an electrical circuit (in watts) as a function of its current ccc (in amperes) is modeled by:
p(c)=−20(c−3)^2 + 180
which currents will produce no power (i. e. 000 watts)?
enter the lower current first.
lower current: amperes
higher current:

Lowest Current : c=0 and 6 Amp

Highest Current : 3 amp

Step-by-step explanation:

We are given our function as

We are asked to determine the values of current c at which the power P(c) is equal to 0

Hence

Now we solve the above equation for c

subtracting 180 from each side we get

Dividing both sides by -20

Taking square root on both sides

c-3= ±3

adding 3 on both sides

c=±3+3

hence

c= 0

or

c=6

At c=0 and 6 amperes the power will be minimum

Now we have to find the c at which the power will be the highest

Represents a parabola

subtracting 180 from both sides we get

Comparing it with standard parabola

(h,k) will be the coordinates of the vertex

Hence here

h=3 , k = 180

Hence in this equation

The vertex will be (3,180)

Or at c=3, P = 180 the maximum

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

10000

step-by-step explanation: divide by 2,