When an old building is to be torn down, mr. pham’s company removes the bricks, cleans off the mortar from the bricks, and then sells the bricks to companies that restore historic buildings. which compound is mr. pham’s company most likely to use in its work?

The correct answer is "Hydrochloric Acid".

Explanation:

The compound that Mr. pham used in its work is hydrochloroc acid . Hydrochloric acid has many uses, the one that is demonstrated in this question is that it is used to remove rusts and scales from sunstances, especially things made of steel. Hydrochloric acid is used for wide varieties of application in industries.

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.

total distance/total time

(85 + 82)/(5+3)

167/8

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