Quiz 5-1 : Exponential Functions Review

• Growth

• Decay

• Growth

• Decay

• Growth

• Decay

• Growth

• Decay

In 1985, there were 285 cell phone subscribers in Columbus. The number of subscribers increased by 75% each year after. How many cell phone subscribers were in Columbus in 1994?

Bacteria can multiply at an alarming rate when each bacteria splits into two new cells, thus doubling. If we start with only one bacteria which can double every hour, how many bacteria will we have by the end of one day (full day)?

Each year London sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated. How many players remain after 5 rounds?

You have inherited land that was purchased for $30,000 in 1960. The value of the land increased by approximately 5% per year. What is the approximate value of the land in the year 2011?

During normal breathing, about 12% of the air in the lungs is replaced after one breath. The initial amount of air in the lungs is 500 mL. How much of the original air is present after 20 breaths? (Round to the nearest hundredth)

An adult takes 400 mg of ibuprofen. Each hour, the amount of ibuprofen in the person’s system decreases by about 29%. How much ibuprofen is left after 6 hours? (Round to the nearest hundredth)