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A bakery charges $0.10 for a cookie that is 2 inches in diameter. If the price is proportional to the area, how much do they charge for an extra large cookie that is 10 inches in diameter? Assume that each cookie is shaped of a circle.
$ 0.50
$ 1.00
$ 2.50
$ 12.50
 one year ago
 one year ago
A bakery charges $0.10 for a cookie that is 2 inches in diameter. If the price is proportional to the area, how much do they charge for an extra large cookie that is 10 inches in diameter? Assume that each cookie is shaped of a circle. $ 0.50 $ 1.00 $ 2.50 $ 12.50
 one year ago
 one year ago

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Faman39Best ResponseYou've already chosen the best response.0
@tkhunny can you able to help me with this ?
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
Here's the important part: "If the price is proportional to the area" Translate that Price = k*Area or just P = k*A. After that, there MUST be some given information. "$0.10 for a cookie that is 2 inches in diameter" There it is. Now what?
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
Don't do that. You just went magically from a partially set up problem statement to a solution out of the air. Show your work and think it through. We have: P = k*A. and "$0.10 for a cookie that is 2 inches in diameter" Thus: 0.10 = k*pi*(2/2)^2 = k(pi) ==> k = 1/(10pi) Now what?
 one year ago

Faman39Best ResponseYou've already chosen the best response.0
I m kinda confuse, you are saying multiply 2 three times then divide with 10, right?
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
No. You must read this problem very carefully. You are given the DIAMETER, but the relationship is with the AREA. You must convert. Diameter/2 = Radius. pi*Radius^2 = Area. It was mean of the question writer to use '2', since there were already two '2's in the development.
 one year ago

Faman39Best ResponseYou've already chosen the best response.0
oh ok thank you @tkhunny for helping, i will try another way
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
Once we ahve determiend 'k', we are nearly done. k = 1/(10pi) (1/10pi)*pi*(10/2)^2 = 25/10 = 2.50
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
I don't understand the question. You just made me work the whole problem. It's 2.50.
 one year ago

Faman39Best ResponseYou've already chosen the best response.0
I am sorry i could not get on beginning for network prob, now i went from up, where explain all, now i got. thanks so much @tkhunny !
 one year ago

Faman39Best ResponseYou've already chosen the best response.0
So sorry for troubling :( i m really terrible
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
No name calling! Just spend the time it takes. You'll get it.
 one year ago

Faman39Best ResponseYou've already chosen the best response.0
I am really sorry for everything :(
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.1
Read some material on "Direct Proportion". It's not impossible to learn it.
 one year ago
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