Ethan had planned to visit his local post office to change 400 pound into euros exchange rate was £1 to 1.25 euros however the post office was closed so went on monday the exchange rate was £1 to 1.20 euros how many fewer euros did he recieve due to the delay? What percentage loss was caused by this delay?

$20 and 4%

Step-by-step explanation:

Firstly, we are to calculate the amount of euro in dollars. The amount he is supposed to exchange to initially is; 400 * 1.25 = $500

Now he changed for 400 * 1.2 =480

The amount of dollars he received fewer will be 500-480 = $20

We now also calculate the % loss.

That would be 20/500 *100 = 4%

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584