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...Educated guess Answer You can make any guess you think is reasonable. For example, you might assume that about half of the vehicles were motorbikes – say, ten of the vehicles. To keep track of your guesses, a table is quite useful. As you make adjustments to your guesses, remember that the number of motorbikes plus the number of cars must equal 21. Table 1 Calculating...

...de Quadros, C.A. (1979) ‘Global eradication of poliomyelitis’, Annals of Internal Medicine, Vol. 127, issue 2, pp. 156-158, American College of Physicians; Figure 2.2 Reprinted from Infectious Diseases by Armstrong and Cohen, Vol 1, p.22.3 by permission of the publisher Mosby; Figure 3.1 Dr Alan Cann; Figure 3.2 Reproduced by permission of Jean-Yves Sgro; Figure 5.2...

...Education Resource Centre (SERC); https://creativecommons.org/ licenses/ by-nc-sa/ 3.0/ Figure 5: Andonee - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=38635547 Figure 6: courtesy of Daniel Herron Figure 10: NASA, ESA, and M. Brown - http://www.nasa.gov/mission_pages/hubble/news/eris.html . Originally uploaded to en.wikipedia by

...education. To complete this course you will need access to a calculator, a notepad and pen, and a protractor. Enrolling on this course will give you the opportunity to earn an Open University digital badge. The badge is a great way to demonstrate your interest in the subject. What you learn by completing the course will really help if you wish to enrol on a formal...