Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Ok. Basically my friend asked me to help her with her maths tonight but there are few things I couldn't remember how do to... its is like 2 years since I did my GCSE... so thought of coming here, obv. lol!!

    1. You're given the following :

    x 1/√y

    when x is 3.6 and y is 1.44, what is the equation connecting x and y??
    (3marks)


    2. You are given the following:

    PQ/R

    P is 50 (1 Significant Figure)
    Q is 1000 (2 sf.)
    R is 0.04477 (4 sf.)

    What is the minimum possible value??


    Can someone give me the compound interest equation, thanks!!

    Offline

    10
    ReputationRep:
    For question 1.

    When x ∝ 1/√y this means that  x = \frac{k}{\sqrt{y}}

    Sub in the values of x and y to find the value of k, then substitute this back into the equation above.
    Offline

    0
    ReputationRep:
    For question 2, for the minimum value, P and Q have to be as small as possible while R has to be as big as possible

    50 becomes 45

    1000 becomes 950

    0.04477 becomes 0.044775.

    Put these into PQ / R and you get your answer..
    Offline

    10
    ReputationRep:
    For question 2. The minimum possible value is when the top of the fraction is as small as possible and the bottom is as large as possible.
    Offline

    11
    ReputationRep:
    (Original post by Uel369)
    Can someone give me the compound interest equation, thanks!!
    Heres one;
    Mr Manps invests £5000 in a savings account paying 4.5% per annum. Calculate his total interest after 3 years.
    • Thread Starter
    Offline

    0
    ReputationRep:
    Thanks guys!!
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 1, 2010

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?
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.