A labor push a crate through 12m and 720 J of work .The magnitude of force was

Explanation:

The magnitude of the force can be found by using the formula

w is the workdone

d is the distance

From the question we have

We have the final answer as

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the part of the wave he is travelling on is the crest

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.