A 50 million gallon per day (mgd) sanitary water treatment plant was constructed in 1990 at Boston, MA for 150 million dollars. A similar treatment plant with is planned for construction in 2025 in Springfield, MA. The new plant will have a capacity of 30 mgd. Determine the following:A) The estimated cost of the new treatment plant in 1990 dollars. Use Cost Capacity Factor Method and assume p = .75. Assume city-cost indices are: Boston = 115, Springfield = 102. (5) B) The estimated cost of the new treatment plant in 2025 dollars. According to the 2025 projected cost index = 235.6 and the historical cost index for 1990 was 94.3.

60%

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation:

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.