Assuming that the driver of your car immediately takes his foot off the accelerator when he hits 27 m/s, what will be the kinetic energy of your car when it
comes to the base of the hill?

mass= 1429.786 kg

the answer is b i think

object 2 because all the other ones are wrong

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.