A survey among American adults concluded that 20% of adults believe Elvis is still alive, 10% believe they've been abducted by aliens, and 4% believe that both Elvis is still alive and they've been abducted by aliens. What is the probability that a randomly chosen adult believes that Elvis is still alive or they've been abducted by aliens.

(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.