4-1 Practice

Johnston's enrollment increases by 3% every year. Current enrollment is 7500.

A bouncy ball is dropped from 120 feet. After every bounce it returns to 80% of its height from the bounce before.

Ellis deposits $8,000 into a high-interest savings account. He earns 0.8% interest yearly.

Spirochaetes is a bacteria that can double in number every hour if the temperature is between 70 - 85^oF. There are 200 cells initially.

Deflation occurs when the value of money decreases over time. The U.S. dollar deflates at a rate of 4% yearly. Lexi has $500 under her mattress.

Tom's having a tough time in Algebra 2. He got a 64% on his first test. Since then, he's gotten it together. Every test after that has increased his grade by 5% from what it was before.

Does the table show growth or decay?

What is the rate?

Does the table show growth or decay?

What is the rate?

Does the table show growth or decay?

What is the rate?