Brian bought some T-shirts and spent a total of $30 each T-shirt cost the same whole dollar amount how many T-shirts could Brian have bought

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?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Hi, can anyone show me how to do this problem? 100 points for this. in advance