Which of the following is true about the earth's mantle? (2 points) it is solid rock. it is a part of the earth's core. it is a part of the earth's lithosphere. it is a fluid that moves very slowly.

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.

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank