Answer:
3x²-29x+4
Step-by-step explanation:
3x²-x-4=-30x
0=-30x-3x²+x+4
0=-3x²-29x+4
Answer:
7892 dolphins
Step-by-step explanation:
let P denote the dolphin population.
-Notice this is an exponential decay and is denoted as:
![P_t=P_oe^{-rt}](https://tex.z-dn.net/?f=P_t%3DP_oe%5E%7B-rt%7D)
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:
![P_t=P_oe^{-rt}\\\\=20000e^{-0.031\times 30}\\\\=7891.07\approx7892\ dolphins](https://tex.z-dn.net/?f=P_t%3DP_oe%5E%7B-rt%7D%5C%5C%5C%5C%3D20000e%5E%7B-0.031%5Ctimes%2030%7D%5C%5C%5C%5C%3D7891.07%5Capprox7892%5C%20dolphins)
Hence, the dolphin population after 30yrs is approximately 7892
Answer:
none
Step-by-step explanation:
1/3=0.33
3/5=0.6
4/15=0.26
5/6=0.83
4/1000=0.004
13/4=3.25