Please help me. I'm horrible at math (also, 20 points!) Find the area of the following shape. You must show all work to receive credit.

(picture below)

At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?