Apopulation of a certain city decreased from 240,000 in 1985 to 210,000 in 1995 what is the percentage of decrease in the population

12.5%

Step-by-step explanation:

A population of a city went from 240,000 to 210,000, what is the percentage of decrease.

First step is to calculate the amount of the decrease of the population.

It went from 240,00 to 210,000,  so it's a drop of 30,000, right?

To determine the percentage of decrease, we need to see how much that 30,000 weights compared to the original figure of 240,000:

30,000 / 240,000 = 1/8 or 12.5%

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer