Ashop keeper ssells all his item at 40% above costs, if he allows a special dicount of 15% to his friend on selling on price his profit as a percentage cost is

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? ( )

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Is the figure congruent? yes or no?