Use the cost index method to estimate the current construction cost for a building equivalent to one constructed in 1980 at a cost of $2.7 million. according to the engineering news-record, the 1980 average building cost index was 1941. suppose that the current year building cost index has been estimated at 3620.

To determine the current equivalent cost of a construction built in 1980 whose cost was $ 2.7 million, we must establish the relationship between the price index for that year, comparing it with that of the current year.

Taking into account that the average cost index for 1980 was 1941, and that said value is currently 3620, we can note that there was a significant increase in costs. Since 3620/1941 = 1.86, to determine the current cost of construction we must multiply its cost by 1.86.

So, since 2.7 x 1.86 = 5.022, we can establish that the equivalent cost at current prices of said building would have been $ 5,022,000.

bd = 9 cm

step-by-step explanation:

in a 30°-60°-90° triangle, the ratio of side lengths is 1 : √3 : 2. that is, the longest side (hypotenuse) is twice the length of the shortest side.

all of the triangles in your geometry are 30°-60°-90° triangles. ac is the hypotenuse of δacd, and the short side of δabc.

the short side ad of δacd will be half the length of ac, so 3 cm. the hypotenuse ab of δabc will be twice the length of ac, so 12 cm. segment bd is the difference of the lengths ab and ad, so is

bd = ab -ad

bd = 12 cm - 3 cm = 9 cm

comment on side length ratios

you can figure the ratios of side lengths in a 30°-60°-90° triangle by considering the trig ratios of the angles. or you can figure the length of the altitude of an equilateral triangle of side length 2 using the pythagorean theorem.

answer; property tax payment made in july and december;