A town has a population of 118,600 and grows at a rate of 5% every year. Which equation represents the town's population after 4 years?P=118,600(1+0.05)4P=118,600(1+0.05)P=118,600(0.05)4P=118,600(0.95)4
Q. A town has a population of 118,600 and grows at a rate of 5% every year. Which equation represents the town's population after 4 years?P=118,600(1+0.05)4P=118,600(1+0.05)P=118,600(0.05)4P=118,600(0.95)4
Identify initial population and growth rate: Identify the initial population and the growth rate.The initial population of the town is 118,600, and the growth rate is 5% per year, which can be written as 0.05 in decimal form.
Determine exponential growth formula: Determine the formula for exponential growth.The general formula for exponential growth is P=P0(1+r)t, where P is the final population, P0 is the initial population, r is the growth rate, and t is the time in years.
Plug in values for formula: Plug in the values for the initial population, growth rate, and time into the formula.Using the formula from Step 2, we substitute P0=118,600, r=0.05, and t=4 to get the equation P=118,600(1+0.05)4.
Check other options: Check the other options to ensure they do not represent the correct formula.Option B: P=118,600(1+0.05) does not account for the compounding effect over 4 years.Option C: P=118,600(0.05)4 only considers the growth rate raised to the power of 4, which is incorrect.Option D: P=118,600(0.95)4 suggests a decrease by 5% each year, which is not the case.
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