The sum of all the forces acting on an object is zero.
A=

The acceleration would also = 0

Explanation:

This is because net force and acceleration move in the same direction, they are directly proportional. If you have no net force then either your object is in constant velocity or it is at rest, you can refer this back to Newton's first law.

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.