Answer:
4 amp
Step-by-step explanation:
max power is at vertex of parabola so max power of 240 will be when current c = 4
2x+3y=60 solve for x...
x=(60-3y)/2
p=xy^3, using x from above:
p=y^3(60-3y)/2
p=(60y^3-3y^4)/2
dp/dy=(180y^2-12y^3)/2
dp/dy=90y^2-6y^2
dp/dy=0 when:
90y^2-6y^3=0
6y^2(15-y)=0, we know y>0 so
y=15, since x=(60-3y)/2
x=7.5
(We solved it this way because otherwise you get quartic equations and cubic derivatives, yuck :P)
I got 2.5 miles as my answer do you want to know how I got it...
Answer
From My Understanding It Is The First One
Step-by-step explanation: Because It Goes From 1 on top which Adds 5 to the bottom
12 feet divided by 12 is equal to 1 foot ]
therefore a 12 foot long board divided into 12 equal sections has 12 1 foot long sections
