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Sample question 1 - Foundation QuestionĪn isotope of technicium, technicium-99, has a half-life of 6 hours.Ī hospital has a sample which contains 40 mg of technicium-99.Ĭalculate how much technicium-99 will be in this sample after 12 hours. Don't forget to check your rounding.Įdexcel questions courtesy of Pearson Education Ltd. The half-life of a drug is is the period of time required for its. There are many ways to tackle APES math review and to teach new skills. If you are asked to calculate an answer and it has lots of significant figures, you should try to round it to the same number of significant figures you were given in the data in the question. Calculating the value after a specified time period, or the. Half-Lifenot a formula, but a method to solve by sketching out Sample half-life problem with solution Students DO NOT need to memorize any other conversions such as gallons to liters. Matching to its name, the half-life of a reaction is represented by t 1/2. This principle is widely used in medicine and chemistry in predicting the concentration of a component. draw a straight or curved line of best fit (you can use a special best fit line ruler to help with this) The half-life of a reaction is defined as the time taken by a reactants concentration to get reduced to one-half the initial concentration.put the independent variable on the x-axis and the dependent variable on the y-axis.Don't forget to take a ruler and calculator. At t 1/2, C C 0 /2 (by definition of half-life) The general equation C C 0-kt becomes C 0 C kt 2 0 1 2. half-life of the drug (t 1/2), and the area under the curve (AUC), and predict concentrations at given time points. Maths questions might include graphs and tables as well as calculations. Mathematics in Pharmacokinetics What and Why (A second attempt to make it clearer).
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Don't forget to check whether you need to do this. Right from half life math formula to quadratic formula, we have every aspect covered. In some maths questions you will be required to give the units. For example, you might have to calculate two values and then compare them. These questions often require you to prove something mathematically. Some maths questions might ask you to 'show that' something is true. You might earn marks for your working even if you get the answer incorrect. It is important that you show your working - don't just write the answer down. They will then have a blank space for you to show your working. Maths questions often start with the command words 'calculate' or 'determine'.