An experiment gives the value of mass of the same object as 23.5 Kg in 1st attempt, 30 Kg in the second attempt, 25 kg in 3rd attempt. But the real mass of object is 28 Kg. Which of the following statement is correct about the experiment 1) experiment is precise
2) experiment is not precise

2

Explanation:

I'm not sure but I think the answer is 2 because even the average of the 3 values is not quite close 28 Kg.

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.

false

explanation: