Next, the students start a new game. Now, a fourth student is playing for the team with gray shirts: Model B:

During this new game, the ribbon moves to the left (towards the students in the gray shirts). On the model above, draw force vectors above each team that describes this movement.

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

real, smaller and upside-down.   so the answer should be b.

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.