
9 December
Read more: 9 December👉🏼How long is y in the diagram below? 👈🏼Estimate the value of 👆🏼A full water tank springs a leak, at the base, and loses 8% of its contents each minute. What percentage of water is lost over 5 minutes? 👇🏼(ax+1)(x3)(x+b) = 2×3 – 3×2 – 8x – 3. Find a and b. 🖐🏼Ashok buys a…

9708A. 10 November
Read more: 9708A. 10 November1. What are the correct formulae for calculating average cost (AC) and average revenue (AR)? AC AR A B P x Q C D Key: MC = Marginal Cost, MR = Marginal Revenue, P = Price, Q = Quantity, TC = Total Cost, TR = Total Revenue 2. What is always present in monopolistic competition…

iGCSE Number. Calculating with Estimates
Read more: iGCSE Number. Calculating with EstimatesThe approximations used in estimating numbers are compounded when calculations are done with those numbers. For instance, if we know that a = 5.2 to one decimal place and b = 1.3 to one decimal place, then the range for the sum c=a+b can be from 5.15+1.25 through to 5.25+1.35, i.e. 6.4 ⩽ c <…

#ED00H0 In defence of neuroscience
Read more: #ED00H0 In defence of neuroscienceLet me start by making clear that I am not a neuroscientist. Nor a psychologist. I am a mathematics teacher whose formal studies of psychology, excluding a short paper on motivation during my PGCE year, don’t extend beyond Alevel. Nevertheless as a teacher, I maintain a keen interest in the findings from psychology that…