Actual Learning Rate

If you ask in this forum then 'anyone' will always be me (because I am the OpenTuition Paper PM tutor :-) ). What you enter in your calculator really depends on which calculator you have, and so you might have to read the manual that cam with it (if you no longer have it then you will be able to find it by typing the model number into Google :-) ). However, 8500/16x750 = 0.7083333 This is not equal to r4 as you have typed, but is equal to r^4 (i.e r to the power of 4). So r is equal to the 4th root of 0.7083333. I assume that you have a scientific calculator (if not, then of course as you know there is an onscreen scientific calculator provided in the computer based exam). I guess you will remember from school that taking the 4th root of a number is the same as taking the same number to the power of 1/4 (i.e. 0.25). So if you take 0.7083333 to the power 0.25 you will get the result as 0.92 (which is the same as 92%). By using the brackets on the calculator you can enter 8500/16x750 and then take it to the power of 0.25 without having to stop and write it down in the middle :-)