Answer:
7892 dolphins
Step-by-step explanation:
let P denote the dolphin population.
-Notice this is an exponential decay and is denoted as:
Where;
- is the population at time t
- t is the time
- r is the rate of decay or decrease in population
- is the initial population size.
#Given t=30yrs, =20000 and r=3.1%, the population after 30 years is estimated as:
Hence, the dolphin population after 30yrs is approximately 7892
B. 81 square units
Area for a square is length times width. In this case, both are 9 so 9 x 9 = 81