62 is half of one lesss than the cube of a whole number. What is the number

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Which of the following can be used to explain a statement in a geometric proof?

(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.