👉🏼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)(x-3)(x+b) = 2×3 – 3×2 – 8x – 3. Find a and b. 🖐🏼Ashok buys a…

1. 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…

The 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 <…

Let 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 A-level.   Nevertheless as a teacher, I maintain a keen interest in the findings from psychology that…