4. Priyanshi Is Writing Some Statements But She is Confused To Know Whether The Statements Are Correct Or Not? Which answer do you think is correct?
[A] We cannot see anything through an opaque object.
[B] Those materials which do not allow any light to pass through them are called opaque
materials.
[C] If we cannot see through an object at all, it is not allowing any light to pass through it and

i think the answre is C but the option is not complete !

we cannot see anything through an opaque object

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.