Suppose $200 was invested at 9% per annum compounded annually. How many years will it take for the investment to grow to $500 ? David invests $2500 at 11% per annum compounded annually. How many years will it take for the investment to double? Several layers of plastic are stacked together. Each layer reduces the light passing through it by 5%. How many layers of plastic are needed to reduce the intensity to only 1% of the original light? The Township of Brock is growing at a rate of 6.5% per annum. How many people are there in Brock Township now, if there will be 15000 in 4.5 years? If the population of bacteria doubles every 30min, how long would it take for the population to triple? The half-life of two products of a chemical disaster are shown in the chart below: a. Draw a graph showing the percent remaining during the first 5 half-lives. b. Express the percent remaining as a function of the number of half-lives elapsed n. c. What percent of the substance remains after one week? d. How long is it until the percent remaining of each substance is 10% ? Suppose $200 was invested at 9% per annum compounded annually. How many years will it take for the investment to grow to $500 ? David invests $2500 at 11% per annum compounded annually. How many years will it take for the investment to double? Several layers of plastic are stacked together. Each layer reduces the light passing through it by 5%. How many layers of plastic are needed to reduce the intensity to only 1% of the original light? The Township of Brock is growing at a rate of 6.5% per annum. How many people are there in Brock Township now, if there will be 15000 in 4.5 years? If the population of bacteria doubles every 30min, how long would it take for the population to triple? The half-life of two products of a chemical disaster are shown in the chart below: a. Draw a graph showing the percent remaining during the first 5 half-lives. b. Express the percent remaining as a function of the number of half-lives elapsed n. c. What percent of the substance remains after one week? d. How long is it until the percent remaining of each substance is 10%