When the resistance in a circuit remains constant, how are the voltage and current related?
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The current doubles when the voltage doubles because they are directly proportional.
The current doubles when the voltage doubles because they are inversely proportional.
The current is cut in half when the voltage doubles because they are directly proportional.
The current is cut in half when the voltage doubles because they are inversely proportional.

Explanation:

The current doubles when the voltage doubles because they are directly proportional.

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 a. hope this .