Identify each situation in which a quantity grows or decays by a constant percent rate per unit interval

A. The number of cars sold doubles every year.

B. The value of a boat decreases by $3000 every 2 years.

C. The number of visitors at the Zoo increases by 1,000 each year.

D. Each time you start a car engine the remaining engine life decreases by 0.0075%

E. The number of people creating cat videos increases by 15% percent every year.

F. Computer technology increases by a factor of 3 every five years.

2. A block of ice weighing 50 kilograms begins to melt. Each hour the block of ice loses 10% of its weight. Let W be the weight in kilograms after melting for t hours. Describe the relationship between w and t?