The fusion power station could supply the input coil of the step-up transformer with a current of 28 kA at a voltage of 21 kV.
The output coil of the transformer has a voltage of 330 kV.
Assume the transformer is 100% efficient.
Calculate the current in the output coil of the transformer.
current ​

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.

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.