Arlene sleeps for
7hr20min
each night. how many hours does she sleep in a week? write your answer as a mixed number

50.40

Step-by-step explanation:

7 hours and 20 minutes times 7= 50 hours and 40 minutes

And then you have to change it into a mixed number and it is 50.40

geometry: triangles

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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