The diagram shows parts of a wave. A series of waves with an arrow passing through their centers. The highest point of one wave is labeled X. The lowest point of another wave is labeled Y. A bracket labeled Z connects the highest points of 2 waves. Which is shown by the letter X? trough amplitude crest wavelength

its crest because it is correct i answered it and it was correct

Explanation:

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 br