Electronic instruments on a treasure-hunting ship detect a large object on the sea floor. The angle of depression is 290, and the instruments indicate that the direct-line
distance between the ship and the object is
about 1400 ft. About how far below the surface of the water is the object, and how far must the ship travel to be directly over it?

(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.