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Please Help Me
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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1 Attachment
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Question #3
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@ganeshie8

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@welshfella
welshfella
  • welshfella
First thing since the x axis is in units of days make the domain 21 days.
welshfella
  • welshfella
Yes your answer to b is correct.
freemap
  • freemap
Are you looking at question #3?
welshfella
  • welshfella
oh sorry i was looking at question 1 1(c) is incorrect though the number in parentheses after B refers to the number of days so correct is B(12) = 0
freemap
  • freemap
oh thanks so much for telling me
freemap
  • freemap
that it was incorrect
freemap
  • freemap
Were they less than $100 on a for number 3
welshfella
  • welshfella
OK Question 3 (a) On 16th day she had zero in her account and added $100 Note the slope of that graph for the period of 1 day. After that the graph still had a positive straight slope but it was not so steep . This shows that she added a constant amount each day but was it more than $100 or lot?
welshfella
  • welshfella
If it was $100 each day then the graph would keep the same slope.
freemap
  • freemap
ok so if shes adding $100 everyday, then yes it would be more than $100. Right? because shes keeping the same slope of a $100 ?
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@welshfella
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  • freemap
wait but keeping the same slope wouldn't change right, so it would be less than a $100
welshfella
  • welshfella
No after the 16th day she is not keeping the same slope |dw:1450018154639:dw|
welshfella
  • welshfella
the slope becomes less (slope of course is the Y / X
welshfella
  • welshfella
|dw:1450018246345:dw|
freemap
  • freemap
Did you see my last comment
welshfella
  • welshfella
Oh now i see its Yes you are right The amount added each day must be lass than $100
welshfella
  • welshfella
part (b) what is your eatimate of the amount in the bank at day 21?
welshfella
  • welshfella
its about 3/4 of the way up the vertical axis agreed?
freemap
  • freemap
2,100
welshfella
  • welshfella
no the greatest balance was given as $400 so a good estimate would be 3/4 * 400
welshfella
  • welshfella
|dw:1450018619260:dw|
freemap
  • freemap
300 or 8400
welshfella
  • welshfella
300 dollars why do you say 8400?
welshfella
  • welshfella
because the greatest balance she had was $400
freemap
  • freemap
well i looked on your graph and saw 400 and 21 and i just multiply. As i thought it was going across
welshfella
  • welshfella
I see No what we are looking at each day is the balance which cooresponds the a point ion the vertical axis
welshfella
  • welshfella
|dw:1450019009884:dw|
welshfella
  • welshfella
Point P corresponds to day 21 and the balance on that day wa s $300
freemap
  • freemap
ok thank you
welshfella
  • welshfella
For the last part we start with 100 on day 16 and have 300 on day 21 so over 5 days theere is a an increase in $200 so amount added each day = 200/5 - and this corresponds to the slope in the graph
welshfella
  • welshfella
|dw:1450019347479:dw|
welshfella
  • welshfella
excuse my poor drawings!
freemap
  • freemap
I see it perfectly, you're fine
welshfella
  • welshfella
good
freemap
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40
welshfella
  • welshfella
yep
freemap
  • freemap
Thanks again, You've been a great help.
welshfella
  • welshfella
welcome

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