Percent Change and Population Growth

The video tutorial covers calculations of percent changes in various contexts, including rent and stock prices, as well as population growth and decline scenarios. It explains how to calculate percent increase and decrease using a formula, and applies this to real-world examples such as rent prices, stock values, and animal populations. The tutorial also demonstrates exponential growth and decay calculations for populations of cats, tigers, and bacteria over specified time periods.

What was the percent increase in rent prices from 2008 to 2018?

• 40%

• 50%

• 60%

• 70%

If a stock price decreases from $70 to $48, what is the percent change?

• -15%

• -31.4%

• -25%

• -20%

What does a negative percent change in stock price indicate?

• The stock price remained the same

• The stock price increased

• The stock price doubled

• The stock price decreased

How many cats are expected on the island by 2024 if the population grows by 3% annually?

• 50,000

• 60,000

• 71,148

• 80,000

What is the initial population of cats on the island in the year 2000?

• 35,000

• 30,000

• 45,000

• 40,000

By what percentage does the tiger population decrease every five years?

• 5%

• 6%

• 4.5%

• 3%

What will be the estimated tiger population by 2100?

• 19,908

• 15,000

• 10,000

• 25,000

How often does the bacteria population triple?

• Every 10 minutes

• Every 15 minutes

• Every 20 minutes

• Every 30 minutes

What is the initial count of bacteria in the sample?

• 250

• 200

• 150

• 100

How many times does the bacteria population triple in two hours?

• 4 times

• 7 times

• 5 times

• 6 times