The number of bacteria in a laboratory quadruples every hour. There were initially 200 bacteria. Write an expression for , the number of bacteria hours after the initial measurement.
The value of a car depreciates by per year. A new car costs . Write an expression for the car’s value in dollars when it is years old.
The value, V dollars, of a property years from now can be modeled by the function
What is the property’s value now?
What is the rate of increase in the property’s value?
A population of bacteria decreases as a result of a chemical treatment. The population hours after the treatment was applied can be modeled by the function , where .
What was the population when the chemical was first applied?
What is the rate of population decrease?
Peter invested in a fund with a guaranteed annual growth of .
Write an expression for the value of his fund after years.
The fund’s growth is calculated monthly.
We can rewrite the expression for the fund’s value as .
Use the new form of the expression to find the monthly growth rate. Give your answer to 3 significant figures.