Please ASAP Which is an example of a cubic monomial?

x² + 5x - 6

x³ + 5

x² + 3

5x³

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square