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chaotic_butterflies
 one year ago
Geometric Series problem 
Drake received 80 points on a project for school. He can make changes and receive onetenth of the missing points back. He can do this 10 times. Create the formula for the sum of this geometric series, and explain your steps in solving for the maximum grade Drake can receive.
chaotic_butterflies
 one year ago
Geometric Series problem  Drake received 80 points on a project for school. He can make changes and receive onetenth of the missing points back. He can do this 10 times. Create the formula for the sum of this geometric series, and explain your steps in solving for the maximum grade Drake can receive.

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chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0@amistre64 if you're not busy could you possibly help me?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1show me your idea ... and lets see if we can correct it

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1we may need to clarify this part: "He can make changes and receive onetenth of the missing points back." what does it mean to you?

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0Does it mean that he can receive 1/10th of the 20 questions that he missed?

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0Pardon my slow reply, my laptop keeps freezing >~<

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1it may mean, the 1/10 of the remaining points, after a submission.

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0So wait, you mean like he'll be tested on the 20 that he missed and if he got them all right, then he would only receive a potion of that score to be added to his original score? If that makes sense...

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1sounds like that to me. but its pretty vague still say he gets all of them correct in the submission, he gets an extra credit of 20(.1) = 2 but then what about any subsequent submission seeing how he got them all correct on the second try?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1the grading scheme is rather senseless to me. he can obtain more extra credit by getting things wrong and resubmitting? it doesnt seem to be a well thought out question to me.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1Drake received 80 points on a project for school. He can make changes and receive onetenth of the missing points back. make changes? say 1+1 = 3 and receive 1/10 of the missing points back? How is this grading?

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0That's the thing about virtual school, they focus so much on silly scenarios for their questions, and not enough time explaining the content in the lessons! I've tried to get help from the sources that have been offered to me, but it just doesn't seem to connect

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0Oh hold on a minute I might have an idea

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1I have an idea too, but the question still makes no real sense we can determine the number of points remaining after each submission, if .10 is used, we have .90 remaining submission 0: 20 submission 1: 20 (.90) submission 2: (20 (.90))(.90) submission 3: (20 (.90)(.90))(.90) ... right?

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0I don't know if this has to do with anything but virtual school allows its students to retake tests if they need to, and they can reset it however many times until they have reached a certain amount of retakes. Each retake isn't influenced by the other... so if Drake is trying to get extra credit and he isn't satisfied with what he has, then he could reset and test himself on only the portion he got wrong  basically what all that rambling meant is that each retake probably doesn't influence another, I don't know if that's helpful or not it sounded better in my head

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0What you said sounds more logical than what I just spewed out.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1the thing is, it says he can make changes and receive .10 of the missing points back. it does not say: "up to" .10 it does not say: "correct changes" it does not say: anything at all to me

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1the remaining points after 10 submissions looks to be 20(.90)^(10)

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1but that isnt a series, its not a summation process that is being asked for.

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0And this is why it's so important to have a physical math teacher for high school math, I used to actually know what on earth I was doing...

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1score0 = 80 score1 = 80 + 20(.10) score2 = 80 + 20(.10) + 20(.90)(.10) score3 = 80 + 20(.10) + 20(.90)(.10) + 20(.90)(.90)(.10) this is what its looking at in my head ...

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1adding on 10% of the 90% thats left over from the previous submission

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1it actually gets us to the same amount as the sequence setup

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0So should I go with that and assume the he gets the highest score on all of the tries to see what his maximun should be? I mean I guess I could do that but technically it's not creating a overall function

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0Sequence setup?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1its creating it, you just have to see it for what it is. we an form a function from it

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1sequence is a list series is a summation of the terms in a list.

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0I understand that much, but I don't know what you're meaning

amistre64
 one year ago
Best ResponseYou've already chosen the best response.120(.90)^n gives us a list of values depending on n 20(.90)^10 = 6.97 which is the remaining points that cannot be claimed since its been submitted 10 times.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1100  6.97 is the maximum score they can obtain.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1the actual score process: score1 = 80 + 20(.10)(.90)^0 score1 = 80 + 20(.10)(.90)^0 + 20(.10)(.90)^1 score2 = 80 + 20(.10)(.90)^0 + 20(.10)(.90)^1+ 20(.10)(.90)^2 each score is a term, but part of it is also the summation of a geometric series. score n = 80 + 20(.10)(.90)^0 + 20(.10)(.90)^1+...+ 20(.10)(.90)^(n1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this is a geometric series

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1do you know the formula for a geometric series?

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0No Sir (or M'am)

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1then all this harder processing has been rather in vain dont you think ..

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1find the formula for the sum of a geometric series for me ..

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0If you're asking me if I don't understand anything that you've shared with me, I've gotten the basic gist of it. I'll go look for that formula.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1our initial score is 80, which means there is 20 points missing we submit it and our score goes from 80, to 80 + 20(.10), and there is 20(.90) points left to plunder thru we submit it again and our score goes from 80 + 20(.10), to 80 + 20(.10) + 20(.90)(.10) and there is 20(.90)(.90) points left to plunder thru we submit it again and our score goes from 80 + 20(.10) + 20(.90)(.10) to 80 + 20(.10) + 20(.90)(.10) + 20(.90)(.90)(.10) and there is 20(.90)(.90)(.90) points left to plunder thru etc etc etc

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0I found yhe formula I think and it's terrifying

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1lol, that A formula, but thats the summation of an arithmetic series we want:\[S=g_1\frac{1r^n}{1r}\]

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0That's a little less scary but what do the letters stand for ?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1g1 is a constant term, its a common factor among the setup forget the 80, what is the common factor of the rest of it?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.180 + 20(.10)(.90)^0 + 20(.10)(.90)^1+...+ 20(.10)(.90)^(n1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ each term in the underlined part has 20(.10) in common, we can factor them out 80 + 20(.10) [(.90)^0 + (.90)^1+...+ (.90)^(n1)] ^^^^^^^^^^^^^^^^^^^^^^^^^^ this is our series in terms of its ratio g1 = 20(.10) what is r?

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0I've gotten to the point where I have to say the dreaded "I have no idea.."

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1hint: ratio starts with an 'r' the setup in terms of our common ratio is: (.90)^0 + (.90)^1+...+ (.90)^(n1) what is now common among this?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1correct :) so, g1 = 20(.10) r = .90 what is n?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1n = 1, the number of submission we are allowed to make ... \[score_{n}=80+g_1~\frac{1r^n}{1r}\] \[score_{10}=80+20(.10)\frac{1.90^{10}}{1.90}\] which is the same value as the more simpler route: \[score_{10}=10020(.90)^{10}\]

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1im going to run an errand now, so good luck, ask about what it is you are still concerned with.

chaotic_butterflies
 one year ago
Best ResponseYou've already chosen the best response.0Alright, thank you very much!
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