Please help if I don’t pass I’ll have summer school

Which of the following is the shape of a cross section of the figure shown below

What is the gcf of 20c^3-5c^4+30c^6

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?