This unit explores reasons for studying mathematics, practical applications of mathematical ideas and aims to help you to recognize mathematics when you come across it. It introduces the you to the graphics calculator, and takes you through a series of exercises from the Calculator Book, Tapping into Mathematics With the TI-83 Graphics Calculator. The unit ends by asking you to reflect on the process of studying mathematics.

In order to complete this unit you will need
Author(s): The Open University

3.2: Histograms

It is a fundamental principle in modern practical data analysis that all investigations should begin, wherever possible, with one or more suitable diagrams of the data. Such displays should certainly show overall patterns or trends, and should also be capable of isolating unexpected features that might otherwise be missed. The histogram is a commonly-used display, which is useful for identifying characteristics of a data set. To illustrate its use, we return to the data set on infants with SI
Author(s): The Open University

1.2 Real numbers

The rational and irrational numbers together make up the real numbers. The set of real numbers is denoted by . Like rationals, irrational numbers can be represented by decimals, but unlike the decimals for rational numbers, th
Author(s): The Open University

1. Here are some phrases used in photography. Match the French and English equivalents

Author(s): The Open University

1.5.4 Summary

• The Euro has become an important currency of denomination for government and corporate bonds.

• There is now emerging a two-currency world, made up of the US dollar and the EU Euro.

• The advantages to countries of being able to borrow internationally in their own currencies have not been lost to them, so there will be an incentive for the east-Asian countries to develop their own â€˜regionalâ€™ financial markets.

• Author(s): The Open University

Chapel Service - Week 13 - 24 May 2016 - Gary Millar - Luke 23.50-24.53
Gary Millar Chapel Sermon
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MERRY CHRISTMAS BIG HUNGRY BEAR, by Don Wood
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6 International Christmas

This section aims to raise your intercultural awareness, by exposing you to the many and different Christmas traditions around the world. It will encourage you to discover the connections between language and culture and engage you with online communications and research. You will also be given the opportunity to use your own creativity as a learning tool.

Please note that Christmas has been chosen as an example of a festival which is celebrated in different ways in different cou
Author(s): The Open University

Investigating spiders: life on a thread
Whether you find spiders fearful or fascinating, they are to be admired for their web-spinning and prey-catching techniques, and the remarkable methods they use to move from one place to another. In this album, researchers in Denmark and the United States use an 8-legged robot and a virtual spider, high-speed photography, a hot air balloon and a rowing boat to explore the biophysics of spiders. In the audio track, Dr David Robinson of The Open University explains how advances in technology allow
Author(s): The iTunes U team

2.5 Sodium (Na), chlorine (Cl) and potassium (K)

The element sodium is a soft silvery metal and the element chlorine is a greenish gas that is poisonous to humans and many other animals. Yet when these two elements are combined together in a compound called sodium chloride, the properties are quite different. Sodium chloride in its solid form is composed of white crystals and we call it salt. When salt dissolves in water, the constituent sodium ions, Na+, and chloride ions, Clâˆ’ , become separated. Both of these ions
Author(s): The Open University

3.11.2 Answering a question in exam conditions

Write out a few exam questions on pieces of card, shuffle them and then pick out a question at random and try to answer it in the time the exam allows. Doing this can give you a sense of the amount you can reasonably write in an exam. You should also get an idea of whether or not you are being too ambitious about what you can cover within the time constraints of an exam. You should be wary of overshooting the timeslot for an exam answer, and not leaving enough time to complete the remaining a
Author(s): The Open University

1.1 Squares

In general, to square a number, multiply it by itself. This is denoted by writing a small â€˜2â€™ to the top right of the number,

e.g. 4 squared, written 42, is 4 Ã— 4 = 16.

Author(s): The Open University

Acknowledgements

Grateful acknowledgement is made to the following sources for permission to reproduce material in this course:

The content acknowledged below is Proprietary and used under licence (not subject to Creative Commons licence). See Terms and Conditions.

These extracts are taken from DD208 Â© 2008 The Open University.

Course image: Michelle in Flickr m
Author(s): The Open University

#386: Global warming's companion crisis: Reactive nitrogen and its threat to human and planetary hea

Environmental physicist Prof Mark Sutton explains how our fast growing "nitrogen footprint" from agriculture and industry is reaching crisis levels as reactive nitrogen pollutes our air and soil and is a direct threat to human health. A leading researcher and advisor on nitrogen policy, Prof Sutton argues that smarter nitrogen management is not
Author(s): up-close@unimelb.edu.au (University of Melbourne)

Databases are one of the more enduring software engineering artefacts; it is not uncommon to find database implementations whose use can be traced back for 15 years or more. Consequently, maintenance of the database is a key issue.

Maintenance can take three main forms:

• Operational maintenance, where the performance of the database is monitored. If it falls below some acceptable standard, then reorganisation of the database, usuall
Author(s): The Open University

STS-133 Daily Mission Recap - Flight Day 7
A video recap of flight day 7 of the STS-133 mission of space shuttle Discovery to the International Space Station.
Author(s): No creator set

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Course image: Author(s): The Open University

## Study another free course

There are more than 800 courses on OpenLearn for you to choose fro
Author(s): The Open University

Research psychologist Associate Professor Lindsay Oades explains how positive psychology and wellbeing literacy, once largely focused on the individual, are being taken to a group level to promote healthier, more skillful interactions in organisations and human networks. Presented by Dr Andi Horvath.

Author(s): up-close@unimelb.edu.au (University of Melbourne)

Authors:
Tom Sanya