In this lesson I explain how to answer exponential growth/increase/decay/decrease exam questions. The questions used are taken from recent Cambridge IGCSE Mathematics papers (0580). To skip to specific questions please see below 👇
Question 1 01:25 The number of trees in a forest is decreasing exponentially at a rate of 1.75% per year. 11 years ago there were 980 trees. Calculate the number of trees in the forest now. Give your answer correct to the nearest integer. 0580/23/M/J/23
Question 2 03:11 In 2015, a charity raised a total of $1.6 million. After 2015, the amount increased exponentially by 2.4% each year for the next 5 years. Work out the amount raised by the charity in 2020. 0580/41/O/N/21
Question 3 05:43 The value of a car decreases exponentially by 10% each year. The value now is $6269.40. Calculate the value of the car 3 years ago. 0580/43/O/N/21
Question 4 Try one yourself! :) 07:46
Another lesson that you may find useful related to these exam questions can be found below 👇
🌟 Compound Interest • The Maths Prof: Compou...
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20 мар 2024
