While you're in a bus that moves at 100 km/h, you walk from the back to the front at 10 km/h. what is your speed relative to the road outside?
a) 90 km/h
b) 110 km/h
c) 100 km/h
d) 10 km/h

(B) 110 km/h

Explanation:

Since you are moving in the same direction as the bus and you are on the bus, your speed relative to the road will be the addition of the speed of the bus and the speed you are walking at.

Therefore your speed relative to the bus outside = 100 + 10 = 110 km/h

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.

neither accurate nor precise.