Need lots of lots of points if a plane crosses through the vertex of rectangular pyramid perpendicular to its base, what would be the 2-d cross section? triangle square circle rectangle

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Beth took out a $20,000 loan for college she is borrowing money from two banks. bank a charges an interest rate of 8.5% bank b charges and interest rate of 10.5% after one year alice owes $1860 in interest how much money did she borrow from bank a

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"