CHECKPOINTS (continued) 10. A billiard ball collides with an identical stationary billiard ball. Assuming that the
collision is elastic, which of the following is true of the ball that was originally
stationary?
O a. It moves in the opposite direction as the ball that collided with it, and it has
half the velocity.
Ob. It moves in the same direction and with the same velocity as the ball that
collided with it.
O c. It remains stationary.

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.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr