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Mathematics 20 Online
OpenStudy (itrymath):

you think you can get away with me not asking quetions!??!?!? Well i got some right here please help (:

OpenStudy (itrymath):

OpenStudy (irishboy123):

The last sentence before the Parts bit can be summarised as \(\Delta I = -0.025 I ~ \Delta x\) which in calculus terms is \(\dfrac{dI}{dx} = -0.025 I \), an exponential solution The new-improved version can be summarised as: \(\Delta I = - 3 \Delta x\) which in calculus terms is \(\dfrac{dI}{dx} = -3 \), a linear solution

OpenStudy (itrymath):

@sunnnystrong

OpenStudy (itrymath):

i dont understand his way but if you do the same way just start from there

OpenStudy (sunnnystrong):

I will try my best to help :D

OpenStudy (itrymath):

okay so it can be a function

OpenStudy (itrymath):

f(x)=1200(2.5)^x

OpenStudy (itrymath):

but thr light decreases so wouldnt that be 1-2.5?

OpenStudy (itrymath):

f(x)=1200(-1.5)^x

OpenStudy (irishboy123):

i can add your pdf to the banter, but it won't help :) |dw:1481488589304:dw|

OpenStudy (itrymath):

Part A:

OpenStudy (sunnnystrong):

@IrishBoy123 any ideas?

OpenStudy (sunnnystrong):

I'm thinking something like; \[f(x)=1200(1-0.025)^x\]

OpenStudy (irishboy123):

sunny i answered the thing!! yes, **clearly** it can !!

OpenStudy (itrymath):

Part A: yes this can be described as a function since it has all the following to properly graph on a graph .

OpenStudy (itrymath):

bruh am i wrong :(

OpenStudy (itrymath):

oh you did answer it -_-

OpenStudy (itrymath):

@IrishBoy123 i dont understand 1 thing -_- @sunnnystrong

OpenStudy (sunnnystrong):

@IrishBoy123 XD i honestly have no idea sorry lol.

OpenStudy (itrymath):

like this my teacher hasen't teached for sure, and if i write down something i dont know hes going to ask me and then im screwed like really screwed xD

OpenStudy (irishboy123):

@sunnnystrong @ItryMath the verbalese in that question is excruciating.... completely if you can rip it into math, think you are on a sounder footing but i think you need to be happy with that, yerself :)

OpenStudy (irishboy123):

@sunnnystrong tu!

OpenStudy (sunnnystrong):

Yeah the way the phrased things.... don't really know where to start :/

OpenStudy (itrymath):

im confused ,brb going to go through a quick sezuire

OpenStudy (itrymath):

@IrishBoy123 explain me in the simplest way possible please

OpenStudy (irishboy123):

let me go back and look at the words, forgive the typo's: "If 1200 Lumens of light enters the cable, the intensity decreases by 2.5% per metre of cable"

OpenStudy (itrymath):

yes

OpenStudy (itrymath):

how about 1200-(2.5)^x

OpenStudy (irishboy123):

Ok so we might say that: \(\Delta I\) is somehow related to "other stuff"

OpenStudy (itrymath):

whats TriangleI mean?

OpenStudy (irishboy123):

a change in I

OpenStudy (itrymath):

whats I stand for

OpenStudy (itrymath):

other stuff?

OpenStudy (irishboy123):

intensity remember that idea ??!!

OpenStudy (itrymath):

yes

OpenStudy (irishboy123):

intensity = other stuff

OpenStudy (itrymath):

okay

OpenStudy (itrymath):

so whats next

OpenStudy (irishboy123):

for me, it's The Matrix

OpenStudy (itrymath):

whats that

OpenStudy (itrymath):

@IrishBoy123

OpenStudy (itrymath):

so if i write that down is that everything the question is asking for

OpenStudy (irishboy123):

only if you agree with it :( |dw:1481491706846:dw|

OpenStudy (itrymath):

so which part is which?

OpenStudy (itrymath):

@IrishBoy123

OpenStudy (itrymath):

is there any other way of explaining this problem or is this the only way ?

OpenStudy (irishboy123):

this is the only way i know how. however, i will will hang here until i think you get it, if that is what you want !!

OpenStudy (itrymath):

okay start explaing for part A if you dont mind

OpenStudy (itrymath):

\[\Delta I\]

OpenStudy (itrymath):

Okay its other stuff but whats other stuff?

OpenStudy (irishboy123):

this is really interesting stuff you there??

OpenStudy (itrymath):

yes

OpenStudy (itrymath):

yes im here

OpenStudy (irishboy123):

OK!!

OpenStudy (irishboy123):

So? Do you use twiddla? Cos the next bit is all fiddling about with letters. Unless you have a question.

OpenStudy (itrymath):

no i dont use twiddla

OpenStudy (itrymath):

whats twiddla

OpenStudy (itrymath):

tbh you have so much so i dont know xD

OpenStudy (irishboy123):

it's like a whiteboard.

OpenStudy (itrymath):

how can i access it

OpenStudy (itrymath):

uh what now lol

OpenStudy (itrymath):

@518nad you know how to do this?

OpenStudy (itrymath):

@@harman.singh @sshayer

OpenStudy (itrymath):

@harman.singh

OpenStudy (itrymath):

@sweetburger

OpenStudy (itrymath):

@Will.H

OpenStudy (itrymath):

@Will.H let me make a new post instead

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