Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    I'm really struggling with finding bounds for decimal places. I also don't understand what it means by "substitute degree of accuracy". The question is:

    24e = (square root of s) divided by t

    s = 3.47 correct to 2dp
    t = 8.132 correct to 3dp

    "Work out e to substitute degree of accuracy. Show all working out and give a reason"

    If anyone could help I would be extremely grateful!
    Offline

    15
    ReputationRep:
    typo?

    migh the question not mean "scientific"...?
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Hasufel)
    typo?

    migh the question not mean "scientific"...?
    Yes, I think so.
    Offline

    19
    ReputationRep:
    (Original post by steph_11011)
    I'm really struggling with finding bounds for decimal places. I also don't understand what it means by "substitute degree of accuracy". The question is:

    24e = (square root of s) divided by t

    s = 3.47 correct to 2dp
    t = 8.132 correct to 3dp

    "Work out e to substitute degree of accuracy. Show all working out and give a reason"

    If anyone could help I would be extremely grateful!
    First of all, work out the upper bound of the question and the lower bound of the question. Then work out the middle of them both to get an suitable degree of accuracy.

    To work out the upper bound use the formula, Upper Bound / Lower Bound for this type of equation.

    To work out the lower bound use the formula, Lower Bound / Upper Bound for this type of equation.

    So, 24e = (square root of s) / t

    Not going to give you the answer.
    But here is how it works.

    For the Lower Bound:
    24e = (Square root of s) - Lower Bound / T (Upper Bound)
    Then to find e = Divide that ^ answer by 24.

    Do the same for Upper Bound, but replace the formulas.

    Then work out the average, and that should be the answer !
    Offline

    19
    ReputationRep:
    (Original post by Hasufel)
    typo?

    migh the question not mean "scientific"...?
    He probably meant suitable degree of accuracy.
    Offline

    15
    ReputationRep:
    (Original post by Chittesh14)
    He probably meant suitable degree of accuracy.
    Ahhh! -
    Offline

    2
    ReputationRep:
    (Original post by Chittesh14)
    First of all, work out the upper bound of the question and the lower bound of the question. Then work out the middle of them both to get an suitable degree of accuracy.

    To work out the upper bound use the formula, Upper Bound / Lower Bound for this type of equation.

    To work out the lower bound use the formula, Lower Bound / Upper Bound for this type of equation.

    So, 24e = (square root of s) / t

    Not going to give you the answer.
    But here is how it works.

    For the Lower Bound:
    24e = (Square root of s) - Lower Bound / T (Upper Bound)
    Then to find e = Divide that ^ answer by 24.

    Do the same for Upper Bound, but replace the formulas.

    Then work out the average, and that should be the answer !
    How many decimal places should the answer be accurate up to?
    Offline

    19
    ReputationRep:
    (Original post by Darshan98)
    How many decimal places should the answer be accurate up to?
    You can make it either 3 significant figures or 4 significant figures.
    But in this question, as the number e will be so low and will have at least 1 or 2 leading zeros - I would recommend 3 decimal places or 4 decimal places.
    Offline

    2
    ReputationRep:
    i have got this question:
    w= square root of (x/y)
    x=5.43 correct to 2 decimal places
    y=4.514 correct to 3 decimal places
    calculate w to a suitable degree of accuracy
    how many sig fig should the answer the answer be
    Offline

    19
    ReputationRep:
    (Original post by Darshan98)
    i have got this question:
    w= square root of (x/y)
    x=5.43 correct to 2 decimal places
    y=4.514 correct to 3 decimal places
    calculate w to a suitable degree of accuracy
    how many sig fig should the answer the answer be
    I would say 3 significant figures.


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    See attached image
    Good luck.Name:  Upper and Lower Bound.png
Views: 1067
Size:  69.2 KB
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.