Find the perpendicular distance from the point p(2, 7, 9) to the xy-plane.

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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? ( )

Ftara spends $219 a month for her car payment and she makes $3,200 a month, what percent of her monthly income is spent on her car payment?