Answer:
Step-by-step explanation:At the start of the question the population of the lake was 60 fish 1 year ago.
In one year the population dropped 25%.
25% of 60 is 15.
60 minus 15 equals 45
Answer:
A) Differential equation for population growth in case of individual immigration is:

B) Differential equation for population growth in case of individual emigration is:

Step-by-step explanation:
Population growth rate in the absence of immigration and emigration is given as:

A) When individuals are allowed to immigrate:
Let r be the constant rate of individual immigration given that r >0.
Differential equation for population growth in this case is:

B) In case of individual emigration:
Let r be the constant rate of individual emigration given that r >0.
Differential equation for population growth in this case is:

The answer is A
A centroid of a triangle is the point where the three medians of the triangle meet. A median of a triangle is a line segment from one vertex to the mid point on the opposite side of the triangle.
Answer:
It should be A
Step-by-step explanation:
I hope this helps
Add and subtract the second term to the expression and factor by grouping.
4k(y-1)(3y+5)