The histogram below shows the number of downloads of a song over time. approximately how many downloads were there between 8 p.m and 9 p.m?

Given data:

It is a graphical display where the data is grouped in to rangesA diagram consists rectangles, whose area is proportional to frequency of a variable and whose width is equal to the class interval. It is an accurate representation of the distribution of numerical data.

From Figure:  

        Each box in the graph (small rectangle box) is assumed to be one download. So, in the graph the time between 8 p.m to 9 p.m, the number of downloads are 8.75 approximately (because the last box is incomplete, therefore 8 complete boxes and 9th is more than half).

So, We conclude that the total number of downloads are approximately 9 in the time span of 8 p.m. to 9 p.m.

F=m*a; a=F/m  

a=3/3=1 m/s²