Understanding exponential and logarithmic functions

Mr. Higgins opened a savings account with a deposit of $55,000 at a local bank. The bank offers an annual interest rate of 5.5%, compounded monthly. Calculate his amount after 10 years.

The fish population in a local stream is increasing at a rate of 3% per year. The original population was 48,000.

Using the rate in the problem, how many fish will be in the local stream in 6 years? Round your answer to the nearest whole number.

• 57315

• 57314

• 231686

• 231687

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation. Then determine how many bacteria there will be after 3 years.

• 1098.5

• 245

• 171.5

• 120.05

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the decay rate?

• ^.08

• ^1.08

• .92

• 8

• 8.76

• 0.974

• 0.023

• 0.061

A population of birds is decreasing by 8% each year. If there were 36,000 birds to being with, how many birds are left in 6 years?

• 1,728,000

• 57,127 birds

• 21,828 birds

• 9,437,184 birds

Rick wants to put money in his savings account. Rick puts $2500 in his account that grows by 8.5% each year. Based on his situation, what is the best estimate for the amount Rick will have in his saving account after 7 years?

• $4425.36

• $1342.42

• $185414.82

• $17458432402.34

 The population of a school is 1000 students and is increasing at a rate of 3% each year.  What will the population be in 5 years?

• 1159.27
• 2000
• 1159
• 300

A population of fish starts at 8,000 and increases by 6% per year.

What will the fish population be in 10 years?

What is the percent rate of change?

• 25%

• 75%