Which answer shows an absolute reference. $A$20, $20.00, A20, (A20)

Arecipe calls for 2 cups of flour to make a cake. you look in the stock room and see a bag of flour that has a tag that says this bag contains 25 cups of flour. how many complete cakes could you make from this bag of flour?

Ten students compared the amount (in dollars) they spent on books each week. the box plot shows the results. the median amout they spent each week is . the difference of the first and third quartiles of the data set is?

If there's any college students out there can you tell me if algebra is really important in college