If the distance of an object is determined from the relation: d = a X + b Y Where: (d) is the distance covered by the body. (a)is a physical quantity which has a dimensions (L T^-1). (b)Is a physical quantity which has a dimensions (L T^-2). So: * The dimension formula of (X) is T and that of (Y) is T^2.

The dimension formula of (X) is T and that of (Y) is T^-2

The dimension formula of (X) is T^-1 and that of (Y) is T^2.

The dimension formula of (X) is T^-1 and that of (Y) is T^-2.

The dimension formula of X is T and that of Y is  T^2

Explanation:

                     d = aX + bY is ACTAULLY  

                     so v = LT^-1

                          t = T

                          numerics do not have any dimensional formula so ignore

                          a = LT^-2

                          t = T^2

                         So answer for x is T and y T^2

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.