He distance from city a to city b is about 175175 mi by ferry. it takes 66 hr less to travel by the same ferry from city b to city c, a distance of about 7070 mi. what is the average rate of the fer

The average speed will be 2.54 Km/h

Explanation:

Given that

A to B

Distance = 175175 m=175.175 KM

B to C

Distance = 7070 m=7.07 Km

Lets take time taken from B to C is t then A to B will be t+66

We know that

Distance = velocity x time

175.175 =  V x (t+66)              1

7.070 = V x t                      2

From equation 1 and 2

t=2.77 hr

Now by putting the values in equation 2

7.07 = V x 2.77

V = 2.54 Km/h

So the average speed will be 2.54 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.