Question

Aki’s bicycle has determined that when x hundred are built, the average cost per bicycle is given by c(x) = 0.5x^2- 1.9x+10.45, where c(x) is an hundreds of dollars.
How many bicycles should the shop build to minimize the average cost per bicycle?

Answer 1

derive it, find critical points, determine if derivative is going from negative to positive at each point. If so, voila, minimum

Answer 2

I do not get what you are saying could you please explain

Answer 3

sorry is this for algebra 2 or calc class?

Answer 4

Algebra

Answer 5

if its for algebra 2, do it the lame way and do x = -b/2a at the vertex

Answer 6

Thank you any way I still do not know what you are tell me I guess I will try back tomorrow

Answer 7

ok wait

Answer 8

a = .5, b = -1.9,
plug those into -b/2a, and you'll get the answer

Answer 9

I am sorry I have been out of school for a while and am earning a college degree and this is all new to me again thank you but I will try again tomorrow

Answer 10

the answer is x = 190 bicycles.

Answer 11

Ok so how did you get that answer did you divide the -1.9 by 2(5)

Answer 12

so you would divide the -1.9 divided by 10

Answer 13

2(.5) =1 so -1.9/1 = -1.9 but it is -b/2a, so multiply that times -1 to get x= 1.9

Answer 14

a = .5

Answer 15

and each x is 100 bicycles, so 1.9 *100 = 190 bikes

Answer 16

Oh Ok thank you now I get