Which of these can be considered a system? Check all that apply.
O a computer
O a car
O a bicycle pedal
O a pencil
O a coffeemaker

O a computer

O a car

O a coffeemaker

Explanation:

A system can be defined as group of things or set of rules that work together towards a common goal. Individually they are just parts and in a way insignificant but when combined with other related things and governed by a set of rules, they work towards a common goal.

Here, computer, car and coffeemaker are systems because they have various parts which work together to perform the overall tasks.

On the other hand bicycle pedal and pencil are just parts.

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.