Exponential Model Word Problems

Does the following equation show growth or decay?
y=10,000*1.26^x

• Growth 
• Decay

Does the following equation show growth or decay?
y=10,000*(0.76)^x

• Growth 
• Decay

Does the following equation show growth or decay?
y=10,000*(1-.05)^x

• Growth 
• Decay

Does the following equation show growth or decay?
y=10,000*(1+.05)^x

• Growth 
• Decay

Does the following equation show growth or decay?
y=100*(0.85)^x

• Growth 
• Decay

Adding 4 to the equation y=2(1.4)^x would do what to the graph?

• Move it up 4
• Movie it down 4
• Move it right 4
• Move it left 4

In 1985, there were 285 cell phone subscribers in the small town of Centerville. The number of subscribers increased by 75% per year after 1985. How many cell phone subscribers were in Centerville in 1994?

• OVERFLOW
• 1994
• 1000
• 43871

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 after half of a day?

• 1024
• 2048
• 8192
• 4096

Each year the local country club sponsors a tennis tournament. Play starts with 256 participants. During each round, half of the players are eliminated. How many players remain after 5 rounds? 

• 2
• 4
• 16
• 8

The population of Hickory NC, can be modeled by P=6191(1.04)t where t is the number of years since 1995. What was the population in 1995?

• 6191
• 1
• 1995
• 1.04