Please help me, I’ve been stuck on this forverver. :( [photo]

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

4. find the geometric mean of 4 and 12. 24 8

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?