33. If a substance reacts with oxygen , the chernical reaction is most likely a (point ) O combustion reaction. Odecomposition reaction. O single replacement reaction . O double replacement reaction.

72 is the mode because it shows up the most number of times

Abcd stupid son of a bitxh

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.