a dynamic cart is released from rest at the top of a 1.5 meter long incline plane. Using photo-gate timers, the time to reach the bottom of the inclined plane is found to be 2.231 seconds. What was the initial speed of the dynamic cart?

Is the orthocenter of a triangle on the inside ?

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?

Having a hard time understanding this question (see attachment).