With no air resistance a projectile fired horizontally maintains its horizontal component of velocity because of no initial vertical component of velocity.
no forces action it.
no horizontal forces act on it.
all of the above
none of the above

Ignoring air resistance, the horizontal component of the projectile's velocity is constant. Vertical velocity at the peak of a projectiles flight is always zero.

Explanation:

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.