If you want the angle it’s 22
In all triangles the angles must add up to 180 so 68 + 90 =158 + 22 =180
Let me start with the second screenshot :-
To find the scale factor you have to enlarge/ dilate A to get B you have a given side so assume that all sides are dilated to the same extent
: .

Thus one can say
m would be

And N would be
23x36=828
This should be your answer
He would have to work 24 weeks to get the same amount from each job.
24 times as it takes 8 times to fill 1 Litre so 8x3 = 24