A culture of bacteria has an initial population of 1600 bacteria and doubles every 2 hours. Using the formula P+ = Po. 28, where Pt is the population after t hours, Po
is the initial population, t is the time in hours and d is the doubling time, what is the
population of bacteria in the culture after 19 hours, to the nearest whole number?

What is the upper quartile in the box plot?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

(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.