On an icy road, a 1200-Kg car moving at 50 Km/h strikes a4400-Kg truck moving in the same direction at 35 Km/h. Thecombination is soon hit from behind by a 1500-Kg car speeding at 65Km/h. If all three vehicles stick together, what is the speed ofthe wreckage?

the answer is to check all of them! they all apply well at least i think so!

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.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr