please! it's geometry
Can someone please explain this to me? My geometry teacher had us copy down the notes and I don't understand them. Please help!! thanks :) also soon because I have a quiz tomorrow.

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

Which of the following three dimensional figures has a circle as it’s base

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?