Help will give points

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these

I’m not good at math can i have ? ?