A20 year old building has been depreciated to $420,000 in value it has been depreciated at 2.5% per year what was its original value

It would be 210,000 cause 2.5x20 = 50% so 420,000 x 50%

The one above is incorrect (no offense) because you have to add 2.5% of its value and then calculate 2.5% of its new value and add that. You add because the value after being depreciated for 20 years is 420,000

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table

Answer:

$4034.40

step-by-step explanation:

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40