Apnp transistor is connected in a circuit so that the collector-base junction remains reverse biased and the emitter-base junction is forward biased. this transistor can be used as a power amplifier because a. the output current will be much smaller than the input current. b. the output voltage will be much larger than the input voltage. c. the output current will be much larger than the input current. d. the output voltage will be much smaller than the input voltage.

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.