Find the area I have no idea how to do this

It’s 350 cause 5 x 7 = 35 and 35 x 10 =350

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.