Afish tank weighs 20.5 pounds when empty. the aquarium is 28 inches long, 12 inches wide, and is filled with water to a depth of 15 inches. water weighs 0.036 pounds per inch. how much does the fish tank weigh when it's full of water?

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.