How do you solve this problem? the fraction is z/2

Is the orthocenter of a triangle on the inside ?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )