15. Electric power is the rate at which an appliance converts electric energy into other forms of energy. Electric y2
power is given by, P= VI = PR-
R
The given figure shows four bulbs 1, 2, 3 and 4, consume same power. The resistance of bulb 1 is 36 Q.
(1) What is the resistance of the bulb 3?
(a) 402
(b) 902
(c) 18
(d) 120
(11) What is the resistance of bulb 4?
(a) 422
(b) 80
(c) 999
(d) 182
(18) If power of each bulb is 4 W, then the total current flowing through the circuit is
(a) 1A
(b) 2 A
(c) 4A
(d) 12 A
(lv) What is the equivalent resistance of the circuit?
(a) 122
(b) 8
(c) 182
(d) 1602

i guess it’s a and b

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.

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..