Help please I am struggling I can’t

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Which number line correctly shows 0.8 + 0.3?