The number of fish and a leg decreased by 25% between last year and this year. last year there were 60 fish in the lake. what is the population this year?

Step-by-step explanation:At the start of the question the population of the lake was 60 fish 1 year ago.

In one year the population dropped 25%.

25% of 60 is 15.

60 minus 15 equals 45

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

step-by-step explanation: